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20 Best Tankless Water Heater For Small Home (Feb 2023 Update)
Are you looking for the Best Tankless Water Heater For Small Home? If so, you’ve come to the right place.
Choosing the Best Tankless Water Heater For Small Home can be difficult as there are so many considerations, such as A. O. Smith, Eccotemp, Eemax, Noritz, Rheem, Rinnai, Stiebel Eltron. We have done a lot of research to find the Top 20 Best Tankless Water Heater For Small Home available.
The average cost is $482.81. Sold comparable range in price from a low of $146.28 to a high of $1878.66.
Based on the research we did, we think Stiebel Eltron Tempra 36 Plus Whole House Electric Tankless Water Heater is the best overall. Read on for the rest of the great options and our buying guide, where you can find all the information you need to know before making an informed purchase.
20 Best Tankless Water Heater For Small Home (20 Sellers)
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Reviewers Noted:
Heats quickly . Easy to set up . Compact . Craftsmanship . Ease of use
Features:
- On-demand, continuous and unlimited supply of hot water
- Sleek design saves space and no venting required
- Electronic switch activated for virtually silent operation. phase- single 60 hz. voltage- 208 v. wattage- 27 kw
Reviewers Noted:
Ease of setup . Craftsmanship
Features:
- External digital thermostatic control with led display (+/1 degree accuracy)
- Most advanced self-modulation, adjust power to meet hot water demand
- Durable copper immersion two heating elements, field serviceable
Reviewers Noted:
Search . Easy to set up . Ease of use . Compact . Craftsmanship
Features:
- German-designed with high quality stainless steel water channel and heating chamber.
- Requires (1) 60 amp breaker and must be installed by a professional plumber or electrician to ensure safety and quality.
- Marey's eco line can maintain 98% efficiency level throughout their lifetime.
Reviewers Noted:
Performs well . Craftsmanship . Ease of setup . Ease of use . Size
Features:
- Part number
- Item weight
- 0.01 ounces
Reviewers Noted:
Heats quickly . Craftsmanship . Noise level . Ease of use . Visual appeal
Features:
- Requires hard wiring | bosch electric mini-tank water heater tronic 3000 t 7-gallon (es8)
- Eliminate time for hot water
- Shelf, wall or floor mounted
Reviewers Noted:
Poorly made . Heating speed . Ease of setup
Features:
- On demand, consistent and endless hot water
- Compact and stylish with digital temperature control in increments of 1°f ranging from 80°f to 140°f
- 99.8% energy efficient. external controls to adjust temperature in increments of 1°f
Reviewers Noted:
Search . Compact . Heats quickly . Craftsmanship . Easy to set up
Features:
- Endless hot water: enjoy unlimited hot water flow throughout the house; compact, durable, and easy to install; professional installation recommended
- Energy and space efficient: space-saving design conserves energy as it heats only when necessary
- Optimal water pressure: high-performance up to 6.5 gpm hot water flow rate for a powerful, constant stream
Reviewers Noted:
Compact . Easy to set up . Well made . Heating speed
Features:
- Smart microprocessor technology unique to tempra water heaters delivers steady water temperature even when flow rate vary as taps are adjusted
- Self-modulating technology saves energy by adjusting electrical usage
- Tempra tankless electric water heaters must be correctly sized and you should consult the sizing guide to determine the correct model for you
Reviewers Noted:
Ease of use . Visual appeal . Craftsmanship
Features:
- Sleek, modern design with black tempered glass front panel featuring an easy to use led display controls
- Features fully automatic temperature controls with an energy saving mode and child lock technology
- Uses standard 1/2" npt water fittings and comes with horizontal venting allowing for a convenient and quick installation
Reviewers Noted:
Heats quickly . Craftsmanship . Visual appeal
Features:
- Serves 2 sinks + 1 shower
- Simple and secure operation
- Easy and quick installation
$559.00
4.3
Reviewers Noted:
Heating speed . Ease of setup . Size
Features:
- Space savings: small, compact design fits perfectly in tight places like under cabinets and sinks
- Great investment and value: energy cost savings
- Easy to maintain: durable, easy-to-replace heating elements
Reviewers Noted:
Easy to set up . Well made . Heats quickly . Compact . Ease of use
Features:
- Airthereal electric tankless water heaters deliver a continuous flow of hot water. with no need to reheat more water in the tank, saving up to 50% on your water heating…
Reviewers Noted:
Search . Compact . Heats quickly . Easy to set up . Easy to use
Features:
- Product type: tankless water heater csa listed: yes voltage: 240 volt wall mountable: yes power source: electric amperage: 66 amps warranty: 1 year maximum pressure: 150 psi water connection size:…
Features:
- Energy star qualified with an energy factor of 0.95 / uniform energy factor of 0.93.
- Thermal bypass valve included – ideal for homes without a dedicated return line.
- Save time with hot water whenever and wherever you need it any size home even for simultaneous uses at multiple fixtures.
Reviewers Noted:
Heating speed . Ease of setup . Visual appeal . Size
Features:
- Starts with only 2 psi of water pressure – amazon exclusive
- Exclusive – vent-free technology no expensive flue required
- Compact size: front 11.5” – depth 6” – height 16”
Reviewers Noted:
Size . Heating speed . Craftsmanship
Features:
- Provide warm water around 90 to 100 degrees f for hand washing at 1 high-flow (1.0 gpm) sink in a warm climate
- Requires 208/240 volt electric service, 1 dedicated 30 amp breaker, and 10 gauge copper wiring
- Equipped with nichrome (nickel-chromium) bare-wire heating element
$804.00
4.5
Reviewers Noted:
Search . Easy to set up . Compact . Poorly made . Quiet
Features:
- Continuous hot water – never run out of hot water, even with back-to-back showers
- Tankless gas water heaters are cost saving and energy efficient
- Reduces energy consumption – automatically adjusts the amount of energy required to heat the water you need
$579.99
4.4
Reviewers Noted:
Search . Compact . Poorly made . Easy to set up . Heats quickly
Features:
- Provides continuous hot water for ultimate convenience
- Patented self modulating technology and design
- Designed with standard and reliable easy to service elements and hea
$499.99
4.9
Reviewers Noted:
Compact . Heating speed . Ease of use
Features:
- Can serve up to 6 applications (4 showers and 2 faucets in in warm to hot climates).
- Reference the performance guide to confirm this unit will provide sufficient hot water to meet your need.
- Requires 3 x 40a double-pole breakers, 3 x 8/2 awg wires, 240v.
$240.00
4.0
Reviewers Noted:
Ease of setup . Craftsmanship . Ease of use
Features:
- 4.0 gpm at 80,000 btus with a temperature rise of 38°.
- Ultra-efficient and ideal for a single-family home, condo, cabin or apartment.
- 0.7 gpm low flow ignition technology.
1. Stiebel Eltron Tempra 36 Plus Whole House Electric Tankless Water Heater
Product Details:
Powerful output, compact design, remarkable energy-saving features. our whole house electric tankless water heaters perform with the highest standards for comfort and reliability. tempra plus models feature advanced flow control, patented in germany and exclusive to stiebel eltron tankless heaters. if hot water demand exceeds working capacity, advanced flow control automatically maintains consistent temperatures by slightly reducing flow. intelligent self-modulating technology continually ensures the least amount of energy is used to heat the water. a tempra 36 plus provides hot water at a consistent temperature for 3-4 bathrooms in warm climates, or 2-3 bathrooms in cool climates. see sizing to determine which model is best for you. stiebel eltron invented tankless electric water heating technology more than 90 years ago, and is still the industry pioneer and world leader. our engineering and manufacturing tradition of excellence means you can depend on the performance and reliability of our products.
Specifications:
| Item – Water Heaters | Electric Tankless Water Heater |
| Water Heater Design | Whole House |
| Water Heater Application | General Purpose |
| Commercial / Residential | Both |
| Watts – Water Heaters | 36,000 |
| Amps – Water Heaters | 150 |
| Voltage – Water Heaters | 208/240 |
| Min. Flow Activation | 0.77 gpm |
| Phase – Water Heaters | 1 |
| Temp. Range – Water Heaters | 70 Degrees to 140 Degrees F |
| Temp. Rise @ 1.5 GPM | 92 Degrees F |
| Temp. Rise @ 2.5 GPM – Water Heaters | 90 Degrees F |
| Pressure Range | 30 to 150 psi |
| Mounting | Any Direction |
| Standards | ETL Listed, WQA |
| Default Temperature | 140 Degrees F |
| Temp. Rise @ 6.0 GPM | 41 Degrees F |
| Wire Size | 6/2 AWG |
| Water Connection | 3/4" NPT |
| Temp. Rise @ 0.5 GPM | 92 Degrees F |
| NEMA Rating | 1 |
| Max. Flow Rate | 1 gpm |
| Elements | Copper Sheathed Housed in Cylinder |
| Market | Commercial, Residential |
| Current | 44 A, 50 A |
| Cord Conductor Gauge | 8/2 AWG Wire |
| Mounting Type | Wall Mounting |
| Minimum Flow Activation | 0.77 gpm |
| Overall Dimensions – H x W x D | 14.5 in x 16.63 in x 4.63 in |
| Minimum Water Pressure | 30 psi |
| Mounting Orientation | Horizontal, Vertical |
| Temperature Range | 70 Degrees F to 140 Degrees F |
| Cold Inlet Size | 3/4 in |
| Operating Voltage | 208/240V AC |
| Environment | Indoor |
| Element Material | Copper |
| Maximum Flow Rate | 1 gpm |
| Adjustable Thermostat | Yes |
| Maximum Water Pressure | 150 psi |
| Power Consumption | 36,000 W |
| Country of Origin (subject to change) | Germany |
Reviews:
I was hoping for so much from this product. Yesterday I took such a hot shower during lunch and then that evening when I gave my daughter a bath, it only came out lukewarm. My shower today was borderline cold. Tomorrow it may be hot again. I live in Northern VA and would not recommend this product. It ruins the experience of our new bathroom remodel. There's nothing worse than remodeling your bathroom to your dream bathroom and hearing your wife say, well that bath wasn't relaxing since she couldn't get hot water.ChristianMC
We purchased this unit about 1 month ago, replacing a Natural Gas water heater with 40g tank. The savings in space, and the removal of the fossil fuel device were our key drivers for this purchase. Our Electric bill has increased significantly, by about 50%, but because we never run out of hot water, showers tend to be longer. And now we can actually fill our tub with hot water without boiling extra water on the stove, so this also has increased our usage. There is an issue with temperature stability, when a toilet is flushed or other demand for water is turned on, the temperature swing is very noticeable. I have added a shower temp gauge, and have seen the temp drop from 42c to 39c when a toilet is flushed, it takes about 10-15 seconds to recover, and likewise, when the water demand drops, the temp goes up from 42c to 44.5c for several seconds. This shower valve has a pressure regulated flow control, so changes in the water will take some time to correct. Pros: Save on Space, endless hot water, retired fossil fuel appliance, not storing heated water we aren't using. Cons: High electricity costs, temperature changes when pressure changes for several secondsChris
Don't buy it…it's terrible,I bought the tempra24 plus from home depot, I installed all specified wires and circuits so it would work properly and efficiently but this this is horrible… my electric and water bill did go down even more than I had Anticipated but hate it…No constant temperature what so ever. I'm getting it removed and getting one installed by a professional.. the tempraplus was a waste of moneyBrian Lackie
2. Rheem Rtex-18 18kw Tankless Electric Water Heater
Product Details:
Ideal for a large apartment/townhome with up to 3 people. the rtex-18 is the mid-range model that can heat over 2.5 gallons per minute. it can handle a shower and a sink in cool climates. in warmer climates, it can handle two showers and two sinks on demand, consistent and endless hot water. 99.8% energy efficient. compact and stylish design with digital temperature control. simple installation. save space. save water. robust copper immersion heating element. advanced self-modulation, adjust power to meet hot water demand. element threaded for easy replacement. save energy.
Specifications:
| Item – Water Heaters | Electric Tankless Water Heater |
| Water Heater Design | Whole House |
| Water Heater Application | General Purpose |
| Commercial / Residential | Both |
| Watts – Water Heaters | 18,000 |
| Amps – Water Heaters | 75 |
| Voltage – Water Heaters | 208/240 |
| Min. Flow Activation | 0.30 gpm |
| Phase – Water Heaters | 1 |
| Temp. Range – Water Heaters | 59 Degrees to 140 Degrees F |
| Standards | UL 499, CSA |
| Amps AC | 75 |
| Default Temperature | 120 Degrees F |
| Temp. Rise @ 6.0 GPM | Limited to Thermostatic Setting |
| Phase | single |
| Tank Capacity | 18 gal. |
| Max. Flow Rate | 4 gpm |
| Elements | Lead-Free Replaceable Cartridge Insert |
| Fuel Type | Electric |
| Temp. Range | 59 Degrees to 140 Degrees F |
| Water Connection | 3/4" NPT |
| Height to Top of Vent Connection | 18.25" |
| Voltage | 208/240VAC |
| Residential / Commercial | Both |
| Mounting | Wall |
| Vent Type | Tankless Electric |
| Pressure Range | 25 to 150 psi |
| Temp. Rise @ 4.0 GPM | 31 Degrees F |
| Height to Top of Heater | 18.25" |
| Temp. Rise @ 2.5 GPM – Water Heaters | 49 Degrees F |
| Wire Size | 8 AWG |
| Temp. Rise @ 2.5 GPM | 49 Degrees F |
| Environment | Indoor |
| Element Material | Copper |
| Current | 75 A |
| Minimum Water Pressure | 25 psi |
| Temperature Range | 80 Degrees F to 140 Degrees F |
| Adjustable Thermostat | Yes |
| Minimum Flow Activation | 0.3 gpm |
| Cord Conductor Gauge | 8 AWG Wire |
| Water Connection Location | Bottom |
| Control Type | Dial, Digital Display with Keypad |
| Maximum Water Pressure | 150 psi |
| Cold Inlet Size | 3/4 in |
| Power Consumption | 18,000 W |
| Overall Dimensions – H x W x D | 18.25 in x 8.25 in x 3.5 in |
| Market | Residential |
| Mounting Type | Wall Mounting |
| Maximum Flow Rate | 7 gpm |
| Operating Voltage | 240V AC |
| Country of Origin (subject to change) | China |
Reviews:
Works great as long as you don't want to take a hot shower. Constant E5 code (cannot keep up with water flow) and shuts down the hot water so all you get is a cold shower. If you let the water just barly trickle outthen it heats up fine. I lost a lot of money setting this up only to find that it will not work unless the water is already warm. Now I have to spend more money to buy a tank hot water heater. Very disappointingRussell Randant
The tank failed and got water all in my house! I sent a warranty claim but never heard any response. I have sent pictures etc to show the product failed again i have yet to hear any response about the issue! Also i used the charts to decide what heater was right for my house but the unit never performed to our liking. It would barely put any water out if i would increase the flow it wouldnt heat the water up. Please contact me i'd love to share more detail.Daniel L
This water heater cannot handle 4.4 gallons per minute. It could not even keep up with my shower or kitchen faucet. It requires a lot of power too. It takes two 40 amp breakers and 8 guage wire to power the elements. When it cannot keep up, it flashes an error code and the troubleshooting guide suggests putting a flow regulator that limits it to 2 gallons per minute (less than half its advertised capacity).claytomcge_6
3. Marey Eco110 Electric Tankless Water Heater – 11kw
Product Details:
Having a proper water heater for your home is essential when it comes to engaging in everyday tasks. the marey eco110 electrical tankless water heater provides a reliable solution while helping you cut down on energy costs. with 11 kilowatts of power, you'll experience efficient heating and flow rate. the water heating unit features heating increases every 28-degrees fahrenheit at a 3 gmp flow rate. enjoy 1 point of use as the water heater can provide hot climates the moment the faucet is opened. the heater is easy to use with the included lcd digital panel for clear readings, controls, and a user-friendly operation. designed with durability in mind, the stainless steel water channel and heating chamber feature long-lasting use and years of providing you hot water. plus, the corrosion-resistant heating element help prevents water build-up from chlorine and calcium for added sustainability. please have a professional plumber or electrician install the heater no more than 40 feet from the intended point of use for the highest safety and quality. have the hot water you deserve at a lower energy consumption with the marey eco110 tankless water heater.
Specifications:
| Required Volt Connection | 220 volt |
| Application Type | Residential |
| Indoor/Outdoor | Indoor |
| Efficiency Level | Super High |
| Fuel Type | Electric |
| Amperage (amps) | 60 A |
| Electricity Phase | Single Phase |
| Finish Family | White |
| Flow Rate @ 35°F Rise (gallons/min) | 2.25 gal (US)/min |
| Flow Rate @ 45°F Rise (gallons/min) | 1.6 gal (US)/min |
| Flow Rate @ 55°F Rise (gallons/min) | 1.5 gal (US)/min |
| Flow Rate @ 65°F Rise (gallons/min) | 1.25 gal (US)/min |
| Maximum Temperature (F) | 95 °F |
| Minimum Activation Rate (gpm) | 0.53 |
| Minimum Temperature (F) | 40 °F |
| Number of Elements | 1 |
| Number of Showers | 1-2 |
| Pack Size | 1 |
| Uniform Energy Factor | 0.98 |
| Water Heater Features | Digital Display,Wall Mounted |
| Certifications and Listings | ETL Listed |
| Product Width (in.) | 7.5 in |
| Water Connection Size (in.) | 1/2 in |
Reviews:
It works fine, but it arrived in a shipping box with no manufactruer box inside, just the water heater. One of the dials has come lose and I had to screw it back on. There was no manual. There was no power cord, but it may not have come with one ( I couldn’t tell you since I didn’t get a box or a manual). There was water inside the unit. I think someone must have gotten it before me and then returned it and factory pure didn’t notice- that or the falsely sold me a used unit. I went ahead and installed it, though, because I had already opened up my water line and removed the old unit. If anyone from factory pure is reading this, I’ll forgive you for a fifty dollar partial refund- that’s about what I’d have expected to save by buying used.cade j.
As for the breaker tripping in other homes, as a licensed electrician of 26 years, I would advise you to take an amperage reading during operation. Most home owners do not have multi meters with an amp clamp so that could be difficult I understand. If the heater is not drawing over 55 amp during operation you may have a defective circuit breaker, it happens. Try replacing your breaker. If the heater is drawing over 55 amps ther is a problem with the heater.Andy A.
4. Rheem Rtex-13 Professional Classic Electric Tankless Hot Water Heater
Product Details:
Rheem rtex-13 electric water heater – provides easy hot water in your household the rheem 13kw tankless water heater provides amply heated water for your entire household. this unit permits reduced power consumption with 99.8% energy efficiency factor. the compact profile has a small footprint that while permitting an easy installation saves a lot of space. the included automatic thermostat keeps the water at a desired temperature. with a robust copper element, you can instantly heat the water for your entire household.
Specifications:
| Operating Voltage | 240V AC |
| Phase | Single |
| Cold Inlet Size | 1/2 in |
| Maximum Flow Rate | 4.8 gpm |
| Minimum Flow Activation | 0.3 gpm |
| Overall Depth | 3.63 in |
| Overall Height | 12.63 in |
| Overall Width | 8.25 in |
| Power Consumption | 13,000 W |
| Adjustable Thermostat | Yes |
| Current | 54 A |
| Environment | Indoor |
| Market | Residential |
| Control Type | Dial, Digital Display with Keypad |
| Cord Conductor Gauge | 6 AWG Wire |
| Default Temperature | 120 Degrees F |
| Element Material | Copper |
| Includes | 1/2 in NPT Adapters |
| Maximum Water Pressure | 150 psi |
| Minimum Water Pressure | 25 psi |
| Mounting Type | Wall Mounting |
| Water Connection Location | Side |
Reviews:
i had it professionally installed and its keeps popping a fuse and stops working all the time . i think it finally completely failed after 1 years of use only and 900 later. i home RHEEM will send me replacement as its under warranty. but seems liek its one of the worse ones to have. all bad ratings. i would like to upgrade to a better one.asta
5. Bosch Tronic 3000t Series Es Point-Of-Use Tankless Water Heater – Electric – 7 Gal
Product Details:
Supplies up to 2 sinks at a time (es8 model). provides hot water quickly at point-of-use. units can be wall / floor mounted (bracket included) with multi-directional mounting available. temperature / pressure relief valve included on es8. glass-lined tank for long service life. model es8 has a hard wired connection.
Specifications:
| Water Heater Profile | Compact |
| Efficiency Level | Super High |
| Fuel Type | Electric |
| Nominal Tank Capacity (gallons) | 7 gal |
| Amperage (amps) | 12 A |
| Application Type | Point of Use |
| Finish Family | White |
| Household Size | 1-2 |
| Indoor/Outdoor | Indoor |
| Maximum Temperature (F) | 145 °F |
| Minimum Temperature (F) | 65 °F |
| Pack Size | 1 |
| Rated Tank Capacity (gallons) | 7 gal |
| Required Volt Connection | 120 volt |
| Tank Lining Material | Glass |
| Uniform Energy Factor | 0.94 |
| Wattage (watts) | 1440 W |
| Certifications and Listings | CSA Listed,UL Listed |
| Product Width (in.) | 17.6 in |
| Tank Valve Size (in.) | 0.75 in |
| Water Connection Size (in.) | 3/4 in |
Reviews:
This is a great point of use water heater. We use it under our kitchen sink which is the worst one in the house when it comes to getting hot water. I connected it to the hot water line. The only downside is that you absolutely have to replace the anode on a regular basis (6 months to a year). It is inside the water heater and requires disconnecting wires and some disassembly. If you do not replace it, the water heater will corrode and leak. Otherwise it is fantastic.eben133
This is installed under a kitchen sink that is on the 3rd floor and the water heater is on the 1st so in the winter it could take up to 3 minutes to get warm water. Now it is instantaneous! Saves water and time. Pretty easy to install. I ordered the 4 gallon one first but after the garbage disposal was attached to the sink there wasn't enough room to accommodate the extra size. Perfect for my needs.KATHERINE
I use this unit to eliminate the TIME, WATER, & ENERGY WASTED in waiting for the hot water from the primary water heater (located in the garage) to reach the point of use. I am totally satisfied with the appearance, durability and performance of this unit. This is the second such unit I have purchased. Just check dimensions to be sure you have proper clearances.Guest
6. Rheem Rtex-04 Electric Tankless Water Heater
Product Details:
Energy-efficient rheem electric tankless water heater only heats water when you need it and features an external temperature display and control, and self-modulating power technology. compact model can save energy, water, and is ideal for delivering unlimited hot water in commercial and residential applications. requires no venting, t&p valve, or drain pan to help ease installation. includes durable brass or stainless steel heat exchanger and a field serviceable element.
Specifications:
| Item – Water Heaters | Electric Tankless Water Heater |
| Water Heater Design | Point-of-Use |
| Water Heater Application | Undersink |
| Commercial / Residential | Both |
| Watts – Water Heaters | 3500 |
| Amps – Water Heaters | 29 |
| Voltage – Water Heaters | 120 |
| Min. Flow Activation | 0.30 gpm |
| Phase – Water Heaters | 1 |
| Temp. Range – Water Heaters | 59 Degrees to 140 Degrees F |
| Standards | UL 499, CSA |
| Elements | Lead-Free Replaceable Cartridge Insert |
| Amps AC | 29 |
| Water Connection | 1/2" NPT |
| Default Temperature | 120 Degrees F |
| Height to Top of Vent Connection | 5.88" |
| Mounting | Wall |
| Pressure Range | 25 to 150 psi |
| Temp. Rise @ 6.0 GPM | Limited to Thermostatic Setting |
| Residential / Commercial | Both |
| Voltage | 120 VAC |
| Height to Top of Heater | 5.88" |
| Temp. Rise @ 0.5 GPM | 48 Degrees F |
| Wire Size | 10 AWG |
| Vent Type | Tankless Electric |
| Temp. Range | 59 Degrees to 140 Degrees F |
| Tank Capacity | 3.5 gal. |
| Fuel Type | Electric |
| Max. Flow Rate | 1 gpm |
| Phase | single |
| Watts | 3500 |
| Minimum Flow Activation | 0.3 gpm |
| Control Type | Digital Display with Keypad |
| Cord Conductor Gauge | 10 AWG Wire |
| Temperature Range | 80 Degrees F to 140 Degrees F |
| Minimum Water Pressure | 25 psi |
| Housing Material | Brass |
| Environment | Indoor |
| Mounting Type | Wall Mounting |
| Adjustable Thermostat | Yes |
| Maximum Flow Rate | 1.5 gpm |
| Current | 29 A |
| Element Material | Copper |
| Maximum Water Pressure | 150 psi |
| Power Consumption | 3,500 W |
| Market | Commercial, Residential |
| Operating Voltage | 120V AC |
| Overall Dimensions – H x W x D | 5.88 in x 10.88 in x 2.75 in |
| Cold Inlet Size | 1/2 in |
| Country of Origin (subject to change) | China |
Reviews:
I've got a large house and more children than most. This unit produces sufficient hot water to run several showers at once and never run out, which is the main point. I'm very pleased with this unit. There's one oddity however; When first starting-up, the water temperature gradually increases until the set-point arrives at the delivery spot and holds there for a few moments, then the temperature wanes to lukewarm/cool, then back to specified temperature. This can be quite a jolt to the system if the user isn't prepared 🙂 But the change is gradual enough to get out of the way in time. This is annoying. The display alternates between my chosen set point "130 F" and "E5", which I assume is an error code. But none of the online documentation provides an error code key from which to ascertain the issue. I have two three-way valves in my installation which allows me to run my system in tankless only, tank only, or tankless preheat followed by tank. In the summer I run tankless only, in winter I typically run tankless as preheat and draw from the tank unit.Engineer Dude
i had it professionally installed and its keeps popping a fuse and stops working all the time . i think it finally completely failed after 1 years of use only and 900 later. i home RHEEM will send me replacement as its under warranty. but seems liek its one of the worse ones to have. all bad ratings. i would like to upgrade to a better one.asta
7. Rinnai Value 6.6 Gpm Liquid Propane Tankless Water Heater – White
Product Details:
Specifications:
| Fuel Type | Liquid Propane (LP) |
| Fuel Type | Natural Gas (NG) |
Reviews:
Installed for roughly 3-months and have not experienced any problems. This water heater performs extremely well in our 1,200 s.f. home with 2 full bathrooms. Hot water is very reliable and flow capacity is perfect. Installation is a little complex. But I was able to do it myself by conducting proper research and viewing videos online. Exhaust duct required is very specific. So plan the proper vent kit according to your specific installation (roof or wall venting). You must use the correct exhaust kit for your model and type.JammyK2060
I'm writing a point form review because I don't want to spend any more time on this very average water heater. We have two installed in different areas of our house and both behave identically, so it's not a "lemon" problem. 1. They both make a loud groaning noise when they fire up. I've tried everything – including increasing the gas pipe diameter and changing every setting I can – and still they groan. We may have to move one unit because it is disturbing a neighbor. 2. We wanted to use these as solar water backups. Once the inlet water falls below a certain temperature, they should kick in and maintain hot water. Nope; they don't fire up unless you increase the flow rate to a ridiculous level, eg full hot in the shower. Then you have to wait until they start and deliver hot water. Yes, flow rates during normal usage – eg, shower – are well within spec . This is the real deal-breaker. A fundamental design fault. Did anyone at Rinnai ever test these things? 3. They do NOT come with a controller. We knew this but figured we'd buy one, use it to set each unit up and then disconnect it. Nope; if you disconnect the controller, the unit reverts to non-controller settings. Dumb. 4. Totally agree that the manual is a joke. It's as if it was written only so that someone could tick a box and say, "Comes with a manual". (We also have two Rinnai FC810N vent free wall heaters and they also have inept manuals as well as having some crazy-stupid design faults such as a child proof lock that unlocks if the power goes out!) 5: Rinnai service is non-existent. They just say to contact a registered installer. There is ZERO support in any way for these things. 6. The mechanical build quality is quite high, very solid and good machine tolerances and finish. It's just a pity that the things don't work very well. In short, I would never buy another Rinnai product ever again. And this is after thinking that they were a good, solid Japanese brand I could depend on. Nope!Steve C
We decided to try a tankless water heater when our traditional unit stopped working, and chose Rinnai based on the great ratings and advice from a friend who performs installations. It's been installed for about 2 months. We've been thrilled with our purchase! I like that the unit is small and is mounted way up on the wall. Our utility room seems much larger without the big traditional water heater. It's pretty quiet when it's running. It takes a few seconds for the hot water to reach the tap, but we've adjusted to that. Initially the unit couldn't be set higher than 120 degrees F, but I was able to open the cover and flip the switch so I could set it higher. We've never run out of hot water since we installed the unit. I would certainly recommend a Rinnai unit. It's solidly built and a very good value.HuskyMom4949
8. Stiebel Eltron Tempra 36 Trend Whole House Electric Tankless Water Heater
Product Details:
The tempra 36 trend is capable of providing consistently hot water to several fixtures at once while reducing energy usage. 240/208v – 36 kw copper tankless electric w. digital thermostat tempra trend models feature a memory preset that makes it easy to return to your ideal water temperature at the push of a button. with the tempra trend, you’ll enjoy endless hot water, unrivaled efficiency, and the utmost in comfort. a stiebel eltron tempra responds directly to your demand for hot water without interruption. showers will always be hot, even if there are several taken in a row and they run long. every tempra has self-modulation. self-modulation ensures that only the least amount of energy is used at all times.
Specifications:
| Item – Water Heaters | Electric Tankless Water Heater |
| Water Heater Design | Whole House |
| Water Heater Application | General Purpose |
| Commercial / Residential | Both |
| Watts – Water Heaters | 36,000 |
| Amps – Water Heaters | 150 |
| Voltage – Water Heaters | 208/240 |
| Min. Flow Activation | 0.77 gpm |
| Phase – Water Heaters | 1 |
| Temp. Range – Water Heaters | 70 Degrees to 140 Degrees F |
| Temp. Rise @ 2.5 GPM – Water Heaters | 90 Degrees F |
| Pressure Range | 30 to 150 psi |
| Standards | ETL Listed, WQA |
| Temp. Rise @ 0.5 GPM | 92 Degrees F |
| Mounting | Any Direction |
| Water Connection | 3/4" NPT |
| Wire Size | 6/2 AWG |
| NEMA Rating | 1 |
| Elements | Copper Sheathed Housed in Cylinder |
| Temp. Rise @ 1.5 GPM | 92 Degrees F |
| Temp. Rise @ 6.0 GPM | 41 Degrees F |
| Default Temperature | 140 Degrees F |
| Max. Flow Rate | 1 gpm |
| Maximum Flow Rate | 1 gpm |
| Minimum Flow Activation | 0.77 gpm |
| Element Material | Copper |
| Mounting Orientation | Horizontal, Vertical |
| Market | Commercial, Residential |
| Operating Voltage | 208/240V AC |
| Current | 44 A, 50 A |
| Power Consumption | 36,000 W |
| Temperature Range | 70 Degrees F to 140 Degrees F |
| Mounting Type | Wall Mounting |
| Adjustable Thermostat | Yes |
| Maximum Water Pressure | 150 psi |
| Cold Inlet Size | 3/4 in |
| Overall Dimensions – H x W x D | 14.5 in x 16.63 in x 4.63 in |
| Cord Conductor Gauge | 8/2 AWG Wire |
| Environment | Indoor |
| Minimum Water Pressure | 30 psi |
| Country of Origin (subject to change) | Germany |
Reviews:
A year ago we purchased a new home. I asked the contractor to install a tankless water heater. He installed an electric A O Smith tank unit instead and claimed that he researched tankless units and that they could not keep up with the volume of hot water our three person family would need. We live in a community that provides treated well water. After a year our hot water smelled strongly of sulfer. We were told that the diode in our tank would have to be changed either with a very expensive diode or with the standard one but done annually. Unfortunately A O Smith installs the diode's with a robot or a person that is determined that it would never come out. Removal attempts turned the bolt into a perfectly round piece. It is sunk 6" into the tank which prevents use of a pipe wrench. A new water heater was required or we had to live with the smell. I did my own research and determined that this 2400w tankless unit should provide all of the hot water our family would ever need. I purchased it from Zoro on a Friday and it was on our porch on Sunday when we got home from church. I spent the day replacing the unit. The tankless works great. We are very pleased with it. We have a large tub in our master bath that would only fill half way before the water in the 40 gallon tank model turned cold. The tankless unit stays hot until you turn it off.j The bonus is this takes up only a fraction of the room that the old unit required.Guest
Although this seems like the way to go, I ordered this figuring it would be perfect for the Basement suite that I'm putting in. Ordered it, my contractor took a look at it and informed me that most serviced residential homes do not have enough amps going to them to be able to run this as well as everything else in your home, for a commercial lot it would be fine. That the service to the home would need to be upgraded, which is an even bigger expense. So beware as to whether you're able to use this.frustrated renos
I self installed the unit a week ago. Since my existing electrical panel only had room for one double pole breaker I had to install a 100 amp breaker and run to a sub panel for the two 50 amp breakers required for the unit. I was able to mount the sub panel and the water heater on the wall in the space formerly occupied by the tank heater. I also installed a sediment filter on the input side of the heater. The installation went smoothly and was completed in less than a day. So far the unit is supplying plenty of hot water for my wife and I. We are able to take long, hot showers with no drop in water temperature or water pressure. It can also handle the dish washer and the washing machine, but not at the same time. The unit is well constructed and the installation instructions are good. Total cost of the unit, sub panel, breakers and other fittings came out to less than $800. All and all we are very satisfied and would recommend this unit for any household with similar requirements: 2 people, dish washer and laundry. Three or more people may require a larger unit.
9. Eccotemp I12-Ng Indoor Natural Gas Tankless Water Heater
Product Details:
Safely and efficiently heat your water with the eccotemp i12 indoor natural gas tankless water heater. this hot water heater is great for heating water in small homes, apartments, condos, and cabins, and for light commercial use. enjoy hot water when your cooking, cleaning, or bathing with this energy-efficient water heater. you can run 1 or 2 hot water applications at the same time thanks to this water heater's upgraded pcb performance and gas modulating valve. rated at 4 gallons per minute at 80,000 btus with a temperature rise of 38 degrees, you can quickly heat your water. the 0.7 gallon-per-minute low-flow ignition technology lets you enjoy endless hot water without cold spots. the compact, wall-mounted water heater uses an energy-efficient power cord that works with standard household oulets and powers the internal exhaust fan, digital display and pcb. with its fully automated control system, this natural gas water heater saves more energy and doesn't need a pilot light. you can use this tankless water heater at elevations up to 2,000 feet. with everything you need to get started with installation, the eccotemp i12 indoor natural gas tankless water heater provides hot water when you need it.
Specifications:
| Color | Black |
Reviews:
This works well, much better than the manual model…..you can adjust temperature moreTerri
It's mounted on the wall but not hooked up. The pipe fittings are not standard American fittings (as I was told they are) or when the 3 fittings were threaded it was a terrible job. Looks nice on the wall but can't use it till I figure out the pipe fittings. And I did not get any manuals with it. How to hook it up or operate it.rayedenjules
10. Stiebel Eltron Dhc-E 12 Electric Tankless Water Heater
Product Details:
Stiebel eltron has been a world leader in advanced water heating technology for almost 90 years. our engineering excellence and high-quality manufacturing results in products fulfilling the highest expectations of performance & reliability. dhc-e tankless models are 99% efficient, heating water instantaneously and endlessly and, unlike tank water heaters, have no stand-by energy losses. no venting is necessary. the compact european design saves space, allows installation with the unit visible and gives the flexibility to install in the best location. a dhc-e 12 is ideal for residential and commercial point-of-use sink applications and single-shower whole-home use. it can be easily removed from a seasonal cabin or cottage for over-wintering. the dhc-e 12 is electronically controlled and can be set to deliver water at the temperature desired. the number of sinks a dhc-e 12 can supply depends on the incoming cold water temperature, the water flow through the unit, and the supply voltage.
Specifications:
| Item – Water Heaters | Electric Tankless Water Heater |
| Water Heater Design | Point-of-Use |
| Water Heater Application | Undersink |
| Commercial / Residential | Commercial |
| Watts – Water Heaters | 9000/12,000 |
| Amps – Water Heaters | 50 |
| Voltage – Water Heaters | 208/240 |
| Min. Flow Activation | 0.37 gpm |
| Phase – Water Heaters | 1 |
| Temp. Range – Water Heaters | 86 Degrees to 140 Degrees F |
| Temp. Rise @ 8.0 GPM | 8/10 Degrees F |
| Wire Size | 6 AWG |
| Residential / Commercial | Commercial |
| Temp. Rise @ 1.5 GPM | 41/55 Degrees F |
| Temp. Rise @ 2.5 GPM | 25/33 Degrees F |
| Temp. Rise @ 6.0 GPM | 10/14 Degrees F |
| Temp. Rise @ 2.5 GPM – Water Heaters | 25/33 Degrees F |
| Pressure Range | 150 psi |
| Watts | 9000/12,000 |
| Elements | Copper Sheathed Housed in Cylinder |
| Amps AC | 50 |
| Temp. Rise @ 4.0 GPM | 15/20 Degrees F |
| Phase | 1 |
| Mounting | Vertical |
| Temp. Range | 86 Degrees to 140 Degrees F |
| Water Connection | 3/4" NPT |
| Voltage | 208/240VAC |
| Hot Outlet Type | NPT |
| Operating Voltage | 208/240V AC |
| Power Consumption | 12,000 W |
| Minimum Flow Activation | 0.26 gpm |
| Hot Outlet Size | 3/4 in |
| Cord Conductor Gauge | 6 AWG Wire |
| Current | 50 A |
| Environment | Indoor |
| Adjustable Thermostat | Yes |
| Cold Inlet Size | 3/4 in |
| Market | Commercial, Residential |
| Temperature Range | 86 Degrees F to 140 Degrees F |
| Element Material | Copper |
| Mounting Orientation | Vertical |
| Mounting Type | Wall Mounting |
| Maximum Water Pressure | 150 psi |
| Cold Inlet Type | NPT |
| Overall Dimensions – H x W x D | 14.19 in x 7.88 in x 4.13 in |
| Application | Bathrooms, Break Rooms, Utility Sinks |
| Country of Origin (subject to change) | Germany |
Reviews:
Easy to install and seems to work well so far. Water is hot at the tap end which is a good thing.Reviewed by Heater Shop customer
I bought this tankless water heater several years ago to put in a trailer house at the lake. It worked so well that I bought a second one for a houseboat. I read many reviews on different brands and decided on the Stiebel Eltron after researching. I have been completely satisfied and am glad that I chose this particular brand. #sweepstakesBG
11. Rheem Performance 27 Kw Self-Modulating 5.3 Gpm Electric Tankless Water Heater
Product Details:
This water heater provides instant and continuous hot water for up to 4 showers and 1 faucet (based on geographic location). rheem performance tankless electric water heaters help reduce energy usage, save on energy costs, and are small so they will be a perfect match for installations under a cabinet or sink in your home, office, boat or rv.
Specifications:
| Required Volt Connection | 240 volt |
| Application Type | Residential |
| Indoor/Outdoor | Indoor |
| Fuel Type | Electric |
| Number of Showers | 1-2 |
| Amperage (amps) | 112.5 A |
| Electricity Phase | Single Phase |
| Finish Family | Gray |
| Flow Rate @ 35°F Rise (gallons/min) | 5.27 gal (US)/min |
| Flow Rate @ 45°F Rise (gallons/min) | 4.1 gal (US)/min |
| Flow Rate @ 55°F Rise (gallons/min) | 3.35 gal (US)/min |
| Flow Rate @ 65°F Rise (gallons/min) | 2.84 gal (US)/min |
| Maximum Temperature (F) | 140 °F |
| Minimum Activation Rate (gpm) | 0.25 |
| Minimum Temperature (F) | 80 °F |
| Number of Elements | 3 |
| Pack Size | 1 |
| Uniform Energy Factor | 0 |
| Water Heater Features | Wall Mounted |
| Certifications and Listings | CSA Listed,ETL Listed,UL Listed |
| Product Width (in.) | 21.625 in |
| Water Connection Size (in.) | 3/4 in NPT |
Reviews:
Easier to install than removing the old tank unit. My wife was skeptical at first that this would be as good or better than our old unit with the idea of "unlimited" hot water and it didn't disappoint… We have a small house but both showers and washer can run all at the same time..actionmaytag
This water heater is perfect for my little house, endless hot water. Was somewhat of a challenge to DIY install but I made it happen. This unit drinks lots of power. Be sure you have room in your panel. Shark Bite fittings with copper plumbing is essential, much faster. Would definitely buy this again.rdricker81
12. Airthereal Electric Tankless Water Heater 18kw, 240volts – Endless On-Demand Hot Water – Self Modulates To Save Energy Use – Small Enough To Install
Product Details:
Specifications:
| Capacity | 240 Gallons |
| Power Source | AC |
| Item Dimensions LxWxH | 17.25 x 12.22 x 3.43 inches |
| Voltage | 240 Volts |
| Style | Indoor Installation |
| Mounting Type | Wall |
| Product Dimensions | 17.25 x 12.22 x 3.43 inches |
| Country of Origin | China |
| Installation Method | Wall-Mounted |
| Included Components | Electric Tankless Water Heater 18kW |
Reviews:
pThis 9 kW unit was a warranty replacement for the first unit I installed. The issue with the first unit was that it showed a constant error code of "EF", which should mean the flow sensor isn't working. The circuit card logic was programmed incorrectly, however, which caused this error code to display even though there was not an issue with the flow sensor. Installation was easy. I tested the replacement unit to get some numbers on water temperature rise versus flow rate. It is February in southern Indiana and the water inlet temperature is 47 deg F. I was able to 108 deg F output water temperature at 2 GPM, and up to 131 deg F (unit maximum) at 1.5 GPM. The unit starts working with about 0.5 GPM flow./pS H.
pAirtherial Tankless water heaters have the design, look, feel and function of a well-engineered product. The matte black case and contrasting LCD display transforms a usually boring appliance into a nice "Wall Piece". However, after installation, I contacted the seller to resolve a fundamental hot/cold water issue, and found the representatives of Sain Store to be truly an example of excellence in customer service. The company reps (whom I contacted via phone and email) went far above and beyond my expectations to assist with resolving my issue and identifying the root cause. Ultimately, the problems experienced proved to be resultant of installer error, not an error with their product. I wholeheartedly recommend Airthereal Water heaters for their product quality & the manufacturer's post-sale customer service./pNWShopper007
I bought this water heater because my old tank heater went out. We had one of the big tank ones but it was like 25 years old. Anywho, installation was a tad difficult, but customer service is there for you! Now thats its all hooked up we have hot showers again!! Hot throughout the entire shower and my husband got in right after me and said the same thing!! Works good for the kitchen sink to! I live in Tn.Paula M.
13. Titan Electric Tankless Water Heater N-160
Product Details:
Product type: tankless water heater csa listed: yes voltage: 240 volt wall mountable: yes power source: electric amperage: 66 amps warranty: 1 year maximum pressure: 150 psi water connection size: 1/2 in. maximum temperature: 65 deg. f self cleaning: no assembled width: 7 in. energy star compliant: yes water connection location: side assembled length: 3 in. element wattage: 240 watts assembled height: 12 in. commercial or residential: residential or commercial temperature pressure relief valve: yes by heating water only when necessary the titan n-160 tankless water heater saves money and energy minimum temperature: 55 deg. f space saving heaters are so efficient that they only use a little over one third of the energy of a conventional tank water heater saving you up to an astounding 60% on your electrical cost to heat water element wattage: 240 watt watts: 16 tankless: yes width: 7 depth: 3 volts: 240 amps: 66 height: 12 csa listed: no.
Specifications:
| Power Source | Electric |
| Energy Star Certified | Yes |
| Minimum Temperature | 55 °F |
| Height | 12" |
| Commercial or Residential | Residential or Commercial |
| Water Connection Location | Side |
| Width | 7" |
| Watts | 16 W |
| Maximum Temperature | 65 °F |
| Volts | 240 V |
| Maximum Pressure | 150 psi |
| Water Connection Size | 1/2" |
| Depth | 3" |
| Product Type | Tankless Water Heater |
| Tankless | Yes |
| AMPS | 66 amps |
| Warranty | 1 Yr |
| CSA Listed | No |
| Each Weight | 9.000 LB |
| Velocity | C |
| Hazardous Material | No |
Reviews:
200 amp service. This thing pulling 66 amps . Heat pump pulling 90 amps . If wife cooks, cleans and drys cloths, I think it wont work. Lights dim now with heat pump on and water heater on. Just my thoughts . So now I have it sitting on a shelf collecting dust. But I really cant blame titan. I should have done more than an hour of home work before ordering.metalpayed
14. Rinnai Rsc160in Super High Efficiency Plus 9 Gpm 160,000 Btu Natural Gas Interior Tankless Water Heater
Product Details:
Rinnai's super high-efficiency plus condensing outdoor tankless water heater models offer the most advanced technology. now, with smart-circ, rinnai rsc model water heaters learn your water usage patterns to start circulating hot water on your schedule, anticipating your hot water needs for a shorter wait and saving energy during times when you don't typically use hot water. unlike tank heaters which accumulate rusty sediments, this tankless water heater has a longer lifespan. designed to be extremely compact, this small water heater only takes up the space of a small suitcase, letting you reclaim some of your home's most valuable real estate. this energy star qualified hot water heater can be made even smarter and with wi-fi connectivity; requires control-r module.
Specifications:
Reviews:
Great price, great product. Working nice so far.Tim W.
15. Excel Vent-Free Propane Lp 1.6 Gpm Tankless Water Heater New 10011
Product Details:
Propane gas lpg unit starts with only 2 psi of water pressure – amazon exclusive exclusive – vent-free technology no expensive flue required compact size: front 11.5” – depth 6” – height 16” 2 size d batteries included (for automatic ignition) propane gas exclusive "low water pressure" startup technology * starts up with only 2 psi of water pressure !!! , and up to 120 psi all other tankless gas water heaters require at least 30 psi to startup due to their outdated technology. it is ideal for small apartments , lofts , flats, , and mobile homesthe excel heater saves energy and water by instantly delivering hot water upon opening the hot water tap. its unique and beautiful design will lavishly decorate your kitchen or laundry room. what is vent-free? a vent-free appliance can be installed inside and does not require cumbersome and costly installation of flues and ductwork because it is outfitted with state of the art ods (oxygen depletion safety shutoff rule of the thumb performance criteria this unit is suitable for a multiple points of use, for an entire home- with 2 1/2 bath. however, no more than one point of use at a time is recommended. recommended for incoming cold water temperature above 50°f, however it can take lower incoming temperatures down to 40°f by reducing water flowrate (control knob can be adjusted to less water flow). the excel low pressure startup unit is outfitted with a magnetic water flow sensor , that allows the unit to work at low water pressure, especially those found in rural areas , rv's and boats. all other tankless gas water heaters rely on the outdated rubber diaphragm scheme , that pushes a pin that actuates a microswitch. pressures of the order of 30 psi are needed to move the rubber diaphragm on other older and cheaper units.
Specifications:
Reviews:
16. Stiebel Eltron Electric Tankless Water Heater Mini 6
Product Details:
The mini 6 heats water instantaneously as it flows through the unit. stand by heat losses are completely eliminated. the efficient heating elements are controlled by a simple flow switch. additionally, the mini 6 water heater is equipped with a safety high-limit with manual reset. the combination of meticulous german engineering and the best available materials ensure that every mini 6 is of the highest quality and designed for many years of trouble-free service. the mini 6 can deliver warm or hot water to a single point-of-use, usually a hand wash or utility sink. requires 208/240 electric service professional installation recommended 23.8 amps at 240v, 20.6 amps at 208v flow controls and faucet aerators are highly recommended in conjunction with tankless water heaters. all aerators are designed to fit most common faucets. no pressure relief valves, drains, or circulating pumps are needed. extremely compact design saves space major energy savings unlimited supply of hot water proven reliability sleek design is appealing and can be mounted in plain sight can be mounted with fittings pointing up or down only 7.5′′ x 6.5′′! the stiebel eltron mini 6 tankless water heater is ideal for restrooms or kitchenettes in an office or commercial / industrial setting.
Specifications:
| Height | 6.00 |
| Length | 10.00 |
| Width | 9.00 |
| Hazardous Material | No |
| ECCN | EAR99 |
Reviews:
Montage easy, allerdings brauchts ne 2.5mm Stromleitung und 25 Amperesicherung Das Wasser ist gut warm aber nicht heiß.
Würden wir immer wieder kaufen! Das schwierigste war es den Stecker zu montieren, weil es sich um eine 4mm² Zuleitung handelt. Ansonsten sind wir sehr zufrieden und der 16A Sicherungsautomat hält. Wir haben endlich warmes Wasser in der 2t-Küche! Für heißeres Wasser würden wir mind. einen 11KW DLEH empfehlen.Der Elektrische
17. Rheem Rtg-70xln-1 Outdoor Natural Gas Tankless Water Heater
Product Details:
This is a mid-efficiency outdoor tankless water heater designed for continuous hot water. industry-leading low flow activation with a minimum flow rate of .26gpm and minimum activation flow rate of .40gpm ensures hot water is received even in low demand situations. ultra-low nox burner meets scams rule requirements of safety with low emissions. while our exclusive guardian overheat film wrap prevents our units from reaching the dangerous temperatures others can. add in our maintenance notification settings, self-diagnostic system, and econet enabled mobile app feature (additional kit available), buying this tankless water heater makes perfect sense. included are a digital remote control and 10ft. of thermostat wire. as this unit is for use outdoors no venting is required.
Specifications:
| Fuel Type | Natural Gas |
| Water Connection | 3/4" |
| Voltage | 120V |
| Amperage | 2A |
| Activation GPM | 0.4 |
| Maximum Flow Rate | 7 GPM |
| Minimum Flow Rate | 0.26 GPM |
| Includes Isolation Valve Kit | No |
| Includes Remote | No |
| Direct Vent | No |
| Heating Technology | Non-Condensing |
| Indoor Installation | No |
| Number of Breakers | 1 |
| Vent Type | Vent Free |
| Water Heater Type | Whole House |
| Recirculation | No |
| Default Temperature | 120 °F |
| Ignition Type | Electronic |
| Plug In | Yes |
| Power Source | Hardwired |
| Wattage | 200 |
| Certifications | ANSI, UL |
| Country Of Origin | Japan |
| Energy Star | Yes |
| Low Lead Compliant | Yes |
| Mobile Home Approved | No |
| Outdoor Approved | Yes |
| Uniform Energy Factor | 0.81 |
Reviews:
Bought through Home Depot which does no stock the stainless steel venting nor the required 3/4 inch flex gas line. Very important to have a contractor install unit. Set temp. to max 140 degrees. Customer rep. said that we could have a quaified technician install a chip to mother board to increase temp. to 150 degrees. Gave a 2 star rating because of lack of information on required materials to install.Tuba
This heater has replaced my old regular heater (with a tank). In overall I'm happy with the upgrade, but the feelings are mixed. Pros: 1. It takes a way much less space in the garage. 2. It really saves fuel! My natural gas bill for the water heating has dropped by 2x times. 3. No problem with the exhausted hot water in the house early morning. You use as much as you need with no worries. Cons: 1. If you upgrade form a regular heater, the existing exhaust cannot be usable. You'll have to make new holes in your roof or wall. 2. The blower motor is very loud. Even when feeding just one shower this device makes a lot of noise. 3. It takes time for the heater to ramp-up. In average it's about 20-30 seconds in the closest bathroom. 4. The heater has troubles adapting to the water flow. You'll have to spend about 5 minutes playing with the faucet before getting the right temperature. And if anyone else in the house enables a major hot water consumer, this game restarts. 5. This device has a drain line, which produces a substantial amount of condensate. You cannot just drop it on the floor. So, you'll need a drain line, and it cannot be a closed one (like the line from the washer). In my setup I've installed a condensate pump and attached it to the HVAC drain line (see the image).IgorZ
After a lot of trouble getting a unit that was not totally damaged (still some) in shipping, this unit has been working great for about a week of use now.It does take a bit longer than a tank heater to get hot water to the faucet (more than I expected), but overall it was worth the trade. We have 7 in our household and a 50 gallon water heater did not make it through for everyone to get hot showers/baths. I anticipate saving $50/month going from an electric tank heater to this natural gas tankless, but my plumber thinks it will be closer to $100/month in utilities savings. My plumber's tankless heater has been working in his personal home for over 17 years and still going strong. If we get the savings and the longevity, this will be a significant savings over the long haul. This tankless unit hangs up on the wall and freed up enough space in our laundry/utility room for us to be able to install a huge shelving unit which was a very nice bonus. And the room looks so neat and tidy now too without a water heater sitting on the floor taking up so much space.One other benefit we have noticed. About 3 years ago we installed a water softener in our house. It did make a tremendous difference, but after installing this tankless water heater the difference was even more dramatic than after the initial installation of the water softener. I suspect the old tank water heater was so full of mineral deposits that after treating the water with the softener, the water would then pick up minerals while going through the hot water heater. My plumber agrees. Either way the water has never been so "slick" in our house as it is after installing the tankless water heater (feels like you didn't even get the soap rinsed off it's so slippery). We are definitely enjoying not running out of hot water especially with guests staying at our home. Looking forward to the utility savings and a long lasting water heater that hopefully doesn't fail around that 5-10 year mark as is typical with tank style water heaters.Brandon M.
18. Ecosmart 27 Tankless Electric Water Heater
Product Details:
Ecosmart eco 27 is a 27-kilowatt tankless electric water heater ideal for providing hot water for apartments, condominiums, townhomes and other whole home applications. it can provide between 2.7 and 6.5 gallons-per-minute depending on the inlet water temperature. to select the best solution for your hot water needs, please refer to the sizing guide. with ecosmart you will be happier knowing the warm water you expect is available endlessly, consistently, and on-demand, allowing you to reduce your water and energy waste. now that feels warm all over! ecosmart – sharing the warmth.
Specifications:
| Assembled Depth (in) | 3.75 in |
| Assembled Height (in) | 18 in |
| Assembled Width (in) | 17 in |
| Assembled Weight (lbs) | 13.75 lbs |
| Item is Shipped at this Packaging Level | Y |
| Packaging Depth | 6.5 IN |
| Packaging Height | 19.75 IN |
| Packaging Width | 19.5 IN |
| Package Weight | 14 |
| Package Weight UOM | LB |
| Net Packaged Quantity | 1 EA |
| Water Heater Style | Tankless |
| Manufacturer Warranty | Limited Lifetime Warranty |
| Commercial / Residential | Commercial/Residential |
| Flow Rate @ 45°F Rise | 4.29 gpm |
| Flow Rate @ 77°F Rise | 2.39 gpm |
| Gas or Electric | Electric |
| Temperature Pressure Relief Valve (TPR) | No |
| Water Connection Size | 3/4" NPT |
| Height | 17 in |
| Width | 18 in |
| Weight | 13.75 lbs |
| Maximum BTU | 92127.834 BTU |
| Amperage (A) | 112.5 A |
| Voltage (V) | 240 V |
| Wattage | 27000 W |
| Energy Factor | 99.8 |
| ADA Compliant | Yes |
| CSA Certified | Yes |
| ETL Listed | Yes |
| UL Listed | Yes |
Reviews:
Like all of the 1 star ratings, my unit failed after about a year. It began leaking which caused it to short out. When I called the customer service, they asked for pictures of the leak and the heating elements. They immediately blamed the leak on me for not maintaining the unit. After I prove I did they asked me to send a video of the unit tripping the breaker which made no sense considering the unit was leaking water. In the end they recommended I re-solder the hole. Really?! So, for the sake of having hot water in the middle of winter, I do. Nine months later another hole appears and the exact same issue occurs. This time I demand a replacement after once again being blamed for the issue. After they run out of excuses on why it happened they then say I never registered my warranty, which I did. How in the world do I prove that I registered my warranty when the same people I registered it with claims I didn't? This product has NO support if and when it fails. STAY AWAY FROM THIS COMPANY!! Buy a better unit for a little more money AND keep all of the warranty information just in case.Andre'
To use this unit you will need to have an electrician bring in 3 high voltage lines into your home. $$$$. Any time you use the unit all the lights in the house flicker. After months of that annoyance I contacted dealer and was given a new control panel that I had to install myself. It solved the problem for a couple months then back to the flickering. Two years later the unit just stopped working. Plumbing service call told me I needed another new control panel. Now company says I don’t have lifetime warranty because I didn’t send in warranty card. They claim That they sent me replacement last time as a courtesy. This company is so short sited, they probably paid staff to argue with me more than it would have cost to replace the part. I bought a new part and had it installed…..back to the flickering lights. And do not buy this thinking you will cover the cost with savings. I’ve seen no difference in my electric bills. Read some other reviews. It’s not just the control panel that is garbage.Val
The first couple of months this product was awesome. Water was super hot and was easy to adjust. Then we noticed the water would not get as hot. Adjusted temperature on unit to 140 degrees, removed the filter off end of kitchen sink and nothing happened. Went through the virtual tech guide multiple times and found heating element was out. Tech support shipped a new one. Installed it, no change. Call back and was told you have to soak the heating elements in vinegar for 2-3 hours every six months. Reluctantly did it, no change. Even had it worked you should not have to do maintenance like this on a product not even a year old. Have had experience with other tankless heaters and never had to do maintenance. I've requested a supervisor call me 3-4 times and have yet to receive a call back. This has been going on for two months. Do not go with this product. Product quality is poor and tech support is as well.Daniel Andrews
19. Black & Decker 27 Kw 5.3 Gpm Electric Tankless Water Heater
Product Details:
Unlike conventional tank water heaters, which constantly consume energy to keep your water hot 24/7, this state-of-the-art, digital technology will instantly reduce your energy consumption and save you money on energy costs simply by heating water on demand. the unit does not require any gas lines or venting, and the compact design allows you flexibility to install virtually anywhere – in a cabinet, closet, garage, basement, etc. you can be sure to earn some precious space by installing this unit! (important: inlet temps vary by location and seasonality. selecting the right water heater depends on your incoming water temperature, flow rate, and desired output temperature.
Specifications:
| Voltage (Volts) | 240 |
| Bluetooth Compatibility | No |
| Amps Required for Unit Only (Amps) | 112.5 |
| Smart Compatible | No |
| Width (Inches) | 4.53 |
| Point of Use | No |
| Maximum Gallons per Minute | 5.8 |
| Wire Size (Gauge) | 8 |
| Major Appliances Supplied Simultaneously | 5 |
| Wi-Fi Compatibility | No |
| Weight (lbs.) | 15 |
| Hybrid Heat Pump Technology | No |
| Mobile Home Compatible | Yes |
| Commercial/Residential | Commercial/Residential |
| Depth (Inches) | 17.13 |
| Installation Location | Wall mount |
| Height (Inches) | 14.76 |
| Household Amperage Required (Amps) | 120 |
| Power Output (Kilowatts) | 27 |
Reviews:
This heats the water great in the summer time, a little cooler in the winter time when the ground is cooler. Make sure you measure the distance from you furthest shower to you water hear location before purchasing, to ensure that your water heater will heat the water efficiently.Anonymous
20. Eccotemp Fvi12-Ng Indoor Natural Gas Tankless Water Heater
Product Details:
Product description the eccotemp fvi12-ng tankless water heater is a natural gas fired, indoor tankless water heater designed for small to medium hot water production where you need more than one hot water application at the same time. the eccotemp fvi12-ng tankless water heater is perfect for vacation cabins, cottages, and smaller homes. the eccotemp fvi12-ng tankless water heater comes with a horizontal stainless steel vent kit, ready to install. eccotemp fvi12-ng's 110 volt ul listed power cord powers the internal exhaust fan and digital display. it only pulls about 2 watts idol and 10 watts during operation, making it ideal when energy conservation is paramount. the fvi12 offers a 45 degrees f temperature rise when operating at maximum flow capacity and a 77 degree f temperature rise at 2.3 gpm. some additional features true 1/2" npt water fittings manual water temperature controls natural gas powered sleek modern design 4 gpm flow capacity power ventilation for safety, efficiency and venting options tested-safe electronic ignition system 74,000 btu digital temperature display fully independent gas and water controls precise temperature and water flow adjustment weighs only 20 pounds unit dimensions are 15"x24"x4" stainless vent kit included uses gas only when hot water is on.
Specifications:
| Capacity | 4 GPM |
| Mounting Hardware Included | Yes |
| Dimensions L x W x H (in.) | 28 x 17 x 11 in |
| Typical Application | Hot water supply |
Reviews:
Old 40 gal gas tank decided to bite the dust, we had been looking at tankless but the cost seemed a bit prohibitive. After doing a ton of research, we found this one on Wayfair and decided to take a chance. It proved to be a great decision. Installation was very straight forward and this thing delivers all the hot water my wife and I could ever need.Cliff
I bought 2 of them. one either u freeze and u turn the cold down a little then ur burning ur self. hot water only last 5 mins then it starts to cool off. second one makes really good hot water will last nonstop. only thing is I can pee faster then it comes out. not happy at all. waist of money. should of just got a tank gas heater from the start.LeeR
