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Best Tankless Water Heater For Large Home (2024 Update)
Selecting the right tankless water heater for your large home can seem like a daunting task. With so many factors to consider, it’s important to do your research to find the model that will best meet your family’s hot water needs. When shopping for a tankless heater, you’ll want to look at the flow rate, fuel type, activation flow rate, and number of gallons per minute. The flow rate indicates how many gallons of hot water the unit can supply per minute. For a large home with multiple bathrooms, you’ll likely need a higher flow rate. Fuel type is also key – do you want gas, electric, or propane? You’ll also want to consider the activation flow rate, or the minimum amount of water flow required for the unit to turn on. Finally, pay attention to gallons per minute. Tankless heaters list this specification, so you can determine how much hot water is produced. With some thoughtful consideration of these factors, you’ll be able to zero in on the ideal tankless water heater for your specific large home requirements.
Still unsure about which model is right for you? Don’t worry, with a bit more research you’ll soon be enjoying endless hot water. Ready to learn some tankless water heater basics? Keep reading to find out more!
20 Best Tankless Water Heater For Large 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 . 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:
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:
Search . Compact . Heats quickly . Easy to set up . Easy to use
Features:
- Endless hot water
- Space savings
- Energy saving, ul compliant & etl lead free certified
$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
Reviewers Noted:
Compact . Heating speed . Ease of setup . Craftsmanship . Noise level
Features:
- Tankless water heater
- 54 max amps
Reviewers Noted:
Heating speed . Ease of use
Features:
- Exclusive water savings technology conserving up to 1, 100 gallons per year
- 199, 000 btu (gas consumed per hour)
- Instant hot water
Reviewers Noted:
Performs well . Craftsmanship . Ease of setup . Ease of use . Size
Features:
- Part number
- Item weight
- 0.01 ounces
$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
$1525.61$1373.04
4.4
Reviewers Noted:
Search . Compact . Well made . Heats quickly . Ease of use
Features:
- Energy star qualified.
- Energy factor of.
- Built-in rinnai circ-logictm recirculation program cycles an external pump at pre-set intervals and temperatures to maximize efficiency and comfort.
$1129.06
4.2
Reviewers Noted:
Search . Compact . Heats quickly . Well made . Noise level
Features:
- Temperature controlled, continuous flow, gas hot water system.
- Certified for installation in manufactued (mobile) homes.
- Forced combustion / direct vent.
$269.99
4.6
Reviewers Noted:
Search . Easy to use . Compact . Well made . Easy to set up
Features:
- Provides continuous hot water for ultimate convenience.
- Patented self modulating technology and design.
Reviewers Noted:
Search . Quiet . Compact . Easy to set up . Craftsmanship
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:
Size . Ease of use
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
Reviewers Noted:
Easy to set up . Well made . Heats quickly . Compact . Ease of use
Features:
- The airthereal electric tankless water heater comes in 3 different sizes to tackle all of your hot water needs. instead of a set amount of water being stored in your…
Reviewers Noted:
Size . Noise level
Features:
- 97% thermal efficiency, commercial energy star certified
- Ultra low nox compliant
- Approved for high altitude up to 10,200 ft. (3,109 m)
Reviewers Noted:
Heating speed . Ease of use
Features:
- Hot water without the wait – or the waste.
- Low operating cost – high energy efficiency and water savings setting.
- Space savings – compact, space-saving design. perfect for a tank replacement.
Reviewers Noted:
Ease of setup . Heating speed . Visual appeal . Craftsmanship . Noise level
Features:
- Rated for 2-3 applications used simultaneously means that taking a shower and running two sinks at the same time is effortless.
- Ideal for normal hot water heating applications in any size residential single-family home, condo, cabin, apartment, or light commercial use.
- Csa certified for installation in the us and canada.
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
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. 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
4. 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.
5. Electric Scr2 Titan N-120 Tankless Water Heater
Product Details:
Titan electronic tankless water heater has been around for over 35 years and is ideal for a wide range of applications. these models could be used anywhere from point of use to whole entire house (all depending on ground water temperature going into the unit). they are energy efficient and therefore you will be saving on energy cost. the electrical specifications are based on 220-volt/240-volt be sure to check specifications on unit being purchased. voltage, amperage, breaker and wire may vary depending on local electrical standards. consult a professional plumber and electrician for guidance. remember, that any adjustments made on your unit will take seconds to reach point of use. water temperature from 105°f to 120°f is adequate for all practical purposes.
Specifications:
| Power Source | Electric |
| Energy Star Certified | Yes |
| Minimum Temperature | 55 °F |
| Height | 10" |
| Commercial or Residential | Residential or Commercial |
| Water Connection Location | Side |
| Width | 7" |
| Watts | 11.8 W |
| Maximum Temperature | 70 °F |
| Volts | 220 V |
| Maximum Pressure | 150 psi |
| Water Connection Size | 1/2" |
| Depth | 3" |
| Product Type | Tankless Water Heater |
| Tankless | Yes |
| AMPS | 54 amps |
| Warranty | 1 Yr |
| CSA Listed | No |
| Each Weight | 8.000 LB |
| Velocity | B |
| 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
6. 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.
7. Titan Electric Tankless Water Heater N-120
Product Details:
The titan n-120 is the most popular model for a two-bath house with less than 1,500 sq.ft. on warmer climates. this space saving water heater will provide “endless” hot water for your entire home, apartment and other locations. as the titan only heats the water when it is needed your energy savings on hot water can be up to 60%! in many cases your energy savings in the first year will pay for your investment in a state of the art titan tankless water heater. the titan n-120 will replace an entire conventional tank heater with no disruption to your comfort. let’s not forget the endless hot water you will experience. you won’t have to worry about running out of hot water for your guests after repeated showers! the titan is recommended for warmer climates where the incoming water temperature is above 65 degrees (f).
Specifications:
Reviews:
Works great I would recommend it to any one I got a few rent houses I will be putting it in themferrervettori
SUPPLIES AN OFFICE AND A APARTMENT WITH BETWEEN 2-4 PEOPLE ALWAYS, ALWAYS HOT . NO MORE BIG TANKS FOR US! EASY TO INSTALL LOVE IT!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!rascoparts
8. Rheem Rtgh-Rh11dvln Prestige Series Natural Gas Condensing Tankless Water Heater With Built-In Recirculation
Product Details:
Rheem has been the leader in water heating for nearly 100 years, offering savings, comfort and the protection you need. providing continuous hot water in a compact, space savings design, rheem tankless water heaters are the perfect solution for any sized home. the rheem rtgh-rh series includes a built-in recirculation pump, allowing for instant hot water in every part of your home.
Specifications:
| Heat Exchanger Material | Stainless Steel |
| Fuel Type | Natural Gas |
| Combustion Type | Condensing |
| Vent Type | Direct Vent |
| Venting Category | IV |
| Storage Type | Tankless |
| Mount Type | Wall |
| Installation Location | Indoor |
| Includes Pump | Yes |
| Flow Rate at 40F Temperature Rise | 9.8 GPM |
| Flow Rate at 50F Temperature Rise | 7.7 GPM |
| Flow Rate at 60F Temperature Rise | 6.4 GPM |
| Flow Rate at 70F Temperature Rise | 5.5 GPM |
| Uniform Energy Factor | 0.94 |
| Minimum Flow Rate | 0.5 GPM |
| Ultra Low NOx Emissions | Yes |
| Low NOx Emissions | Yes |
| Voltage | 120 Volts |
| Phase | 1 |
| Frequency | 60 Hz |
| Primary Vent Pipe Diameter | 3 Inches |
| Gas Connection Size | 3/4 Inch |
| Cold Water Inlet | 3/4 Inch |
| Hot Water Outlet | 3/4 Inch |
| Product Width | 17 7/24 Inches |
| Energy Star Listed | Yes |
| CSA Listed | Yes |
| AHRI Certified | Yes |
Reviews:
nice to have hot water instantly unit works great pretty easy to installDon L
Great tankless water heater from Rheem. Got continuous hot water and it pumps out plenty. I installed it myself and was up and running in a few hours. Works with 1/2 inch gas line if need be. The internal recirculation pump is an added bonus especially if you don't want to pipe in to your furthest faucet which may be difficult in a lot of cases. I'm using stainless braided water hoses in a small run for now but will eventually hard pipe it all in.MicDeezNutz
9. 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
10. 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
11. Rinnai Rl94ip Indoor Tankless Water Heater Propane
Product Details:
Welcome to ultimate efficiency. with technology that operates only when hot water is needed, super-efficient heating coils, no pilot light and no storage tank to heat and reheat water, you save on energy and utility costs. in fact, rinnai tankless water heaters use up to 40% less energy than a traditional tank water heater. plus, with premium technology, increased energy efficiency, an improved home energy rating system (hers) index score and optimized leed eligibility, our tankless solutions can increase your home's value. you can even qualify for energy efficiency rebates and tax credits. it's a smart investment for now and the future.
Specifications:
Reviews:
The installation went into the area replacing an old Rinnai R85 . I chose this model since it had the same external dimensions. It was almost a plug and play installation. I had to raise the mounting about 2 inches due to a different vent pipe connection setup. Once mounted and connected the unit fired up and has been operating perfectly for a month.Daniel M.
The not water is plenty hot enough but takes a while to reach the bathroom compared to my old tank hot water heater. My installer says he has the same problem with his identical unit but is unable to remedy. This becomes a problem with my impatient wife. Overall, I guess I'm satisfied so far. I haven't had a propane delivery in order to make a fair assessment on what I may have saved because it is the summer and I won't getting a delivery till next month. The jury is still out.3jz24244
12. Rinnai Luxury 766156006333 Whole House Tankless Water Heater – Natural Gas – 180,000 Btu
Product Details:
Energy star qualified. energy factor of .82. enhanced scale detection lessens possibility of serious, long-term damage to unit. temperature lock function prevents accidental or unauthorized changes to water temperature. leak detection shuts off water to the interior units to limit property damage. temperature controlled, continuous flow, gas hot water system. 0.75" mnpt. finish: chrome. dimensions: 23"h x 9.3"w x 14"d. material: metal. tankless capacity: 7.5 gallons.
Specifications:
| Fuel Type | Liquid Propane (LP) |
| Fuel Type | Natural Gas (NG) |
Reviews:
The Rinnai water heater works well and saves energy but there are some issues that are specific to these water heaters and I am going to tell you the whole truth. Venting: The exhaust/combustion air vent is tested and listed for the unit and you can’t use any other vent. It uses outside air for combustion and is very safe. The direct vent sealed combustion vent allows Rinnai to be installed in bath rooms and bed rooms where traditional B-Vent water heaters cannot. There are limitations of how far away and were you can terminate the vent, check out the installation manual for that. Hot Water: It will make endless hot water until you turn off the tap, a minute, an hour, a week. It can only supply so much at a time, depending on your cold water temperature it will only run two or three fixtures at once. It is an ‘on demand’ water heater, not an ‘instant’ water heater, hot water will take longer to arrive at the fixture than it will from a tank water heater. Gas Supply: These water heaters use less fuel than a tank style water heater but when they want fuel, they want it now. Your tank style water heater required a gas supply of about 40,000 btu’s per hour, your Rinnai will require 180 to 199,000 btu’s per hour. Check you gas supply lines to make sure they have enough capacity for the new load or your new water heater won’t perform to its potential without upgrading the supply line. Expect some maintenance: This is an energy saving, high tech machine with a combustion fan, pc board and electronic solenoid valves to control water and gas flow. Your water quality will also determine how often the unit will need to be flushed, generally every one or two years. Flushing is done by using a small pump to circulate a solution through the unit to dissolve calcium deposits that form inside the heat exchanger. You should flush a tank style water heater too but most people don’t. If you don’t flush your tank less water heater the efficiency will be reduced and you may get inconsistent water temperatures. In the worst case it could plug the heat exchanger or cause it to leak requiring replacement. Finding service: This point can be a little sticky. Rinnai’s warranty isn’t affected by internet purchases but your online retailer won’t be much help. Rinnai has an online dealer locater but if you haven’t purchased the appliance from that dealer it is a little like bringing your own steak to the restaurant, they may cook it for you but they won’t guarantee the results. Be prepared to pay the service man and fight Rinnai for reimbursement or buy locally. Hope this helps.ilubnewyork
We renovated our basement and converted from electric baseboard heat to hot water baseboard heat. There are 2 temperature settings on our unit (a Rinnai RU98i) : 160deg. and 185deg.. We normally run at the 160 setting but during real cold snaps we boost the temperature of the H2O to 185. Unfortunately at the higher setting the unit keeps misfiring and cutting out so I have to revert to the 160 setting. Have had service in several times about this but not very successfully. Frustrating on those days when you need the extra heat.NanuNanu
Rinnai has a great reputation and the two RUC80iN Tankless water heaters live up to it. Its been 2 weeks since installation and no issues with the units themselves. They do not produce instant hot water but it is continuous once it gets there. Negatives: Unit hums when running and vibrates slightly. Would recommend installing on an exterior wall if possible. Installed an add-on Watts recirculating pump and it helps to move the hot thru the recirc. line but I am having issues with the timing of the on/off cycles. Can be an expensive purchase – need to search for a good deal. Shipping box and protection is very minimal from Rinnai. Buy shipping insurance! Positives: Takes up very little room compared to a tank type water heater. Continuous hot water, easy to adjust temperature, ease of installation (weighs a lot less than a tank type).mtsi1
13. Ecosmart Eco 11 Electric Tankless Water Heater
Product Details:
Ecosmart eco 11 is ideal for handwashing in cooler climates and are perfect for a bathroom, small sink or office breakroom. in warmer climates, eco 11 can provide continuous hot water at up to 2.6 gallons per minute, supporting a bathroom shower or kitchen sink. this model has a digital display showing output temperature and can be adjusted in 1-degree increments. ecosmart water heaters are durable, compact and easy to install.
Specifications:
| Assembled Depth (in) | 3.75 in |
| Assembled Height (in) | 12 in |
| Assembled Width (in) | 9.75 in |
| Assembled Weight (lbs) | 7 lbs |
| Item is Shipped at this Packaging Level | Y |
| Packaging Depth | 6.75 IN |
| Packaging Height | 13.5 IN |
| Packaging Width | 10.25 IN |
| Package Weight | 7 |
| Package Weight UOM | LB |
| Net Packaged Quantity | 1 EA |
| Water Heater Style | Tankless |
| Manufacturer Warranty | Limited Lifetime |
| Commercial / Residential | Residential |
| Flow Rate @ 45°F Rise | 1.97 gpm |
| Flow Rate @ 77°F Rise | 1.15 gpm |
| Gas or Electric | Electric |
| Temperature Pressure Relief Valve (TPR) | No |
| Water Connection Size | 1/2" CF |
| Height | 12 in |
| Width | 9.75 in |
| Weight | 7 lbs |
| Maximum BTU | 44357.846 BTU |
| Amperage (A) | 57 A |
| Voltage (V) | 240 V |
| Wattage | 11 kW |
| Energy Factor | 99.8 |
| ADA Compliant | Yes |
| CSA Certified | Yes |
| ETL Listed | Yes |
| UL Listed | No |
Reviews:
Nicely made unit. Clean lines, nice display, lightweight, easy to mount. You'll need a terminal box to wire it up since it comes with it's own pigtail cable (they don't want you to open up the case since it will void it's warranty, apparently; multi breaker units might be different), so I bought an inexpensive 60 amp A/C unit type cut-off switch box with a pull out switch. Just mount it near the heater on the wall and run your 6 gauge wire to it from your breaker panel. I just wish they had included adapters so that you can plumb it to 3/4" piping, so you'll have to buy your own if you wish to connect it to your existing 3/4" pipe. I had trouble using pipe dope (maybe it was too old or the wrong kind?), so I switched to Teflon tape (5 layers) on each fitting and that did the trick. Love the easy to turn dial, press to turn on/off feature and easy to read digital display which comes on when hot water is called for. Now, we'll see how long it lasts before some type of failure…scottcollins
so just got this unit instated and replaced 6 years old Titan (220watts)that just hasn't been getting up desire temperature lately. read bunch of reviews and this unit had better ratings . it was easy to switch from old unit as water and power hookups are almost the same . tested and it want keep up with fully open single sink , I had to reduce water flow at inlet pipe . did not measure but it seams im getting aprx. 2 gal a minute. no way to use 2 outlets at same time. btw we are in coastal northern Washington stateromanles
14. Rinnai V65in 6.5 Gpm Indoor Natural Gas Tankless Water Heater
Product Details:
Product overview rinnai's v65in indoor tankless water heater efficiently delivers up to 5.3 gpm of hot water, making it perfect for your one- or two-bathroom home. easy-to-install and ultra-compact, this unit lets you enjoy all the benefits of rinnai tankless water heating. enjoy clean, reliable hot water at a consistent preset temperature, while saving energy and precious floor space in your home. rinnai commands quality through in-house design, engineering, manufacturing, and support.
Specifications:
| Fuel Type | Liquid Propane (LP) |
| Fuel Type | Natural Gas (NG) |
Reviews:
We've had ours for over a year and it works perfectly. We installed it ourselves and found that process relatively simple. The only issue we had was with the exhaust pipe/vent tube. One was not included and the big box store we bought it from didn't sell it. We finally found one at a HVAC & plumbing supply company over 100 miles away. Overall, a great product that performs perfectly. Very happy with our purchase.WeLiveInTheWoods6404
this product replaced a different brand at our off grid cabin that was a problem from the beginning. this water heater works quickly on demand and doesn't have to be at a full heat setting to work, it will work at a warm setting. our other heater had to be a scalding level to stay on and so many times it didn't light at all. this brand lights every time and temperatures are consistent the whole time needed so no more scalding or sudden ice cold showers. install wasn't a problem other than having adjust because of previous brand. this heater isn't too loud either.offgrid9859
I like the fact that the water heater is not burning fuel except when hot water is being used and that it occupies minimal space compared to a tank-type water heater. We use very little hot water for our seldom used kitchen and bathroom, served by the V65ip. It has provided all that we need and have never run out. We were surprised that the V65ip makes very noticeable noise whenever hot water is being used (un-like a tank type heater). We actually resorted to building a 2' by 4' by 8' tall enclosure around the V65ip, due in part to its noise. It takes a minute or so to get hot water once the tap is turned on, even though our longest pipe run is under 20 ft. With the higher initial cost of the Rinnai and had we known about the noise and hot water delay,we would have considered more carefully installing 2 point-of-use hot water heaters for our small application instead. But the Rinnai is filling our need and we won't be changing– hence my recommendation.BK1080
15. Ecosmart Eco24 24 Kw 240v Electric Tankless Water Heater
Product Details:
Ecosmart eco 24 is a 24-kilowatt tankless electric water heater ideal for providing hot water for apartments, condominiums, townhomes and other whole home applications. it can provide between 2.4 and 5.8 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:
| Required Volt Connection | 240 volt |
| Application Type | Residential |
| Indoor/Outdoor | Indoor |
| Fuel Type | Electric |
| Number of Showers | 1-2 |
| Amperage (amps) | 100 A |
| Electricity Phase | Single Phase |
| Finish Family | White |
| Flow Rate @ 35°F Rise (gallons/min) | 4.68 gal (US)/min |
| Flow Rate @ 45°F Rise (gallons/min) | 3.64 gal (US)/min |
| Flow Rate @ 55°F Rise (gallons/min) | 2.98 gal (US)/min |
| Flow Rate @ 65°F Rise (gallons/min) | 2.52 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.) | 17 in |
| Water Connection Size (in.) | 3/4 in NPT |
Reviews:
I got tired of running out of hot water after one person took a shower. Decided to go for a tankless because of the unlimited hot water, space saving, and electric bill savings. I can tell you that I am not disappointed! After installation my two kids and wife took long baths before I got in to the shower. The water was extremely hot and I only had the hot water faucet turned up half way (mind you, I do NOT have the tankless set to its highest temp. setting). It was recently installed so I haven't been able to tell how it has impacted my electric bill. Cons: With the unit itself, no complaints. However, to install the unit you need to make sure that you can supply it with the power it needs (three 40 amp, double pull breakers). Before purchasing make sure that you have enough room in your electrical panel to accommodate all of the breakers. I ended up installing everything myself because I received quotes from electricians in my area (Miami, FL) for around $1,500 – $2,000 to do the work (electrical only) in my townhouse. They said if it were a single family house the job would be a lot cheaper, so take that into consideration.saavedra33160
I have two of them. Works really wellram1000
Wonderful product. With being in a Southern climate this unit is more than adequate for a 3 bedroom 2 bath home. Wife a I can both take showers at the same time with no issues. Unit is simple to install and operate. With settings up to 140 degrees have it set at 115 and more than hot water. The compact size is fantastic.baldwijj3
16. Airthereal 9kw Electric Tankless Water Heater 2.0gpm- Endless On-Demand Hot Water
Product Details:
Specifications:
| Capacity | 240 Gallons |
| Power Source | AC |
| Item Dimensions LxWxH | 16.14 x 9.84 x 2.6 inches |
| Voltage | 240 Volts |
| Style | Indoor Installation |
| Mounting Type | Wall |
| Product Dimensions | 16.14 x 9.84 x 2.6 inches |
| Country of Origin | China |
| Installation Method | Wall-Mounted |
| Included Components | Electric Tankless Water Heater 9kW |
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.
17. Rinnai Cu199en Sensei 11 Gpm 199000 Btu 120 Volt Commercial Natural Gas Tankless Charcoal
Product Details:
Commercial condensing tankless water heater cu199en from rinnai is precision engineered to provide endless hot water for the most demanding of applications such as restaurants, hospitality, education institutions, multifamily residential buildings and more. cu199en is designed for exterior installation, natural gas fuel, is wifi ready to monitor performance accross multiple units to ensure up time is maintained. multiple venting options offer installation flexibility to meet your existing layout or for new build optimization.
Specifications:
| Fuel Type | Liquid Propane (LP) |
| Fuel Type | Natural Gas (NG) |
Reviews:
The Rinnai is very quiet. I really like that. I dont hear it like the water heater I had. Its small. Not this large ugly gas heater that takes space away. I save money. Does not run every time you use hot water like the old large water heater and you could hear the old style water heater heating the water every time you used hot water. You have the choice of gas or electric. I have gas. Should have invested in this product years ago.Butterfly7926
18. Rtgh-Rh10dvlp Proptane Tankless Water Heater Built-In Recirculation
Product Details:
This is a high efficiency condensing indoor natural gas tankless water heater designed for continuous hot water. the built-in recirculation pump with auto-learning programming not only provides instant hot water but also only provides it when needed. industry-leading low flow activation with a minimum flow rate and minimum activation flow rate of .50gpm. ultra-low nox burner meets scaqmd rule requirements of safety for low emissions. additional safety features include a flame sensor, overheat cut off switch, gas and water leak detectors, and exhaust and water temperature sensors. venting up to 100’ with 3” pvc or up to 50’ with 2” pvc pipe. can be used with up to 5 bathrooms depending on inlet temperature; .94uef (.96ef canada), 199,000btu efficiency.
Specifications:
| Fuel Type | Liquid Propane |
| Water Connection | 3/4" |
| Voltage | 120V |
| Amperage | 2A |
| Activation GPM | 0.5 |
| Maximum Flow Rate | 9.9 GPM |
| Minimum Flow Rate | 0.5 GPM |
| Includes Isolation Valve Kit | No |
| Includes Remote | No |
| Direct Vent | Yes |
| Heating Technology | Condensing |
| Indoor Installation | Yes |
| Number of Breakers | 1 |
| Vent Type | Direct Vent |
| Water Heater Type | Whole House |
| Recirculation | Yes |
| Default Temperature | 120 °F |
| Ignition Type | Electronic |
| Plug In | Yes |
| Power Source | Hardwired |
| Certifications | ANSI, ETL |
| Country Of Origin | South Korea |
| Energy Star | Yes |
| Low Lead Compliant | Yes |
| Mobile Home Approved | No |
| Outdoor Approved | No |
Reviews:
nice to have hot water instantly unit works great pretty easy to installDon L
Great tankless water heater from Rheem. Got continuous hot water and it pumps out plenty. I installed it myself and was up and running in a few hours. Works with 1/2 inch gas line if need be. The internal recirculation pump is an added bonus especially if you don't want to pipe in to your furthest faucet which may be difficult in a lot of cases. I'm using stainless braided water hoses in a small run for now but will eventually hard pipe it all in.MicDeezNutz
19. Eccotemp 20h-Ng Outdoor 6.0 Gpm Natural Gas Tankless Water Heater
Product Details:
The eccotemp 20h outdoor liquid propane tankless water heater is one of the most advanced csa approved outdoor models of the eccotemp tankless line. rated at an impressive 6.0 gpm with a temperature rise of 38 degrees and 150,000 btu per hour, the eccotemp 20h-lp can meet all your hot-water needs! eccotemp's advanced 0.7 gpm low flow ignition technology allows users to enjoy endless hot water without experiencing cold spots. using 2-3 hot water applications simultaneously is a breeze with the eccotemp 20h-lp. with our upgraded pcb (product control board) performance and an all-new gas modulating valve, consumers can experience the best in class temperature performance at a price anyone can afford. the compact, wall-mounted eccotemp 20h-lp has a 110/120-volt ul listed power cord that powers the internal exhaust fan, anti-freeze protection, digital display, and pcb. with its fully automated control system, the eccotemp 20h-lp-only pulls about 12 amps during operation, making it ideal for low energy consumption and efficiency. installation and use of the eccotemp 20h above 2000 feet may affect overall product efficiency and performance. installation and use of the eccotemp 20h above 5000 feet are not recommended. important note: cannot be used for hydronic systems, recirculating, or floor heating.
Specifications:
| Capacity | 6 GPM |
| Battery Required | No |
| Product Weight | 36 lb |
| Dimensions L x W x H (in.) | 24 x 15 x 6 in |
Reviews:
very good and need to by moredebbymurah
Only been using it for a week but it's really good text a while for you to figure out how to get the water the right temperature have to turn it down it's too hot but other than that it looks good I like it it was easy to install no problem so far I would suggest you put at least a three-quarter inch pipe on it bring the water into the house bring the water to the unit and increases the flow and helps water warm up fasterberorog_guf2sjl3p
Good heater but doesn't put out as much hot water as needed for taking 2 showers at once, also it takes a long time for hit water to reach farthest valve, works good enough for 1 person, installation was easy after purchasing around $50 of additional parts, a home owner with average repair skills would struggle a little with the installation.everus-xkwgz0p
20. Stiebel Eltron Tempra 24 Trend Whole House Electric Tankless Water Heater
Product Details:
The tempra 24 trend is capable of providing consistently hot water to several fixtures at once while reducing energy usage. 240/208v – 24 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 | 24,000 |
| Amps – Water Heaters | 100 |
| Voltage – Water Heaters | 208/240 |
| Min. Flow Activation | 0.50 gpm |
| Phase – Water Heaters | 1 |
| Temp. Range – Water Heaters | 70 Degrees to 140 Degrees F |
| Max. Flow Rate | 1 gpm |
| Water Connection | 3/4" NPT |
| Mounting | Any Direction |
| Temp. Rise @ 0.5 GPM | 92 Degrees F |
| Elements | Copper Sheathed Housed in Cylinder |
| Default Temperature | 140 Degrees F |
| Temp. Rise @ 2.5 GPM – Water Heaters | 65.6 Degrees F |
| Standards | ETL Listed, WQA |
| Temp. Rise @ 1.5 GPM | 92 Degrees F |
| Wire Size | 6/2 AWG |
| Pressure Range | 30 to 150 psi |
| Temp. Rise @ 6.0 GPM | 27 Degrees F |
| NEMA Rating | 1 |
| Mounting Orientation | Horizontal, Vertical |
| Element Material | Copper |
| Cold Inlet Size | 3/4 in |
| Temperature Range | 70 Degrees F to 140 Degrees F |
| Operating Voltage | 208/240V AC |
| Mounting Type | Wall Mounting |
| 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 |
| Market | Commercial, Residential |
| Minimum Water Pressure | 30 psi |
| Current | 44 A, 50 A |
| Adjustable Thermostat | Yes |
| Environment | Indoor |
| Maximum Flow Rate | 1 gpm |
| Maximum Water Pressure | 150 psi |
| Minimum Flow Activation | 0.5 gpm |
| Power Consumption | 24,000 W |
| 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.
