2018's Best Tankless Water Heater Whole House Of 2018. Buyer’s Guide.

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Best Tankless Water Heater Whole House
This page features the list of the very best tankless water heater whole house on the market. We have tested hundreds of models while creating it. Rest assured that every tankless water heater whole house from the list below deserves your attention.

We have covered every important detail during the creation of this tankless water heater whole house buying guide. Our team took into account aspects as price, assembly quality, warranty, users score, weight, and many more tankless water heater whole house specifications. This top list of the best tankless water heater whole house is based entirely on the experience of our team members and real buyers from marketplace. Nevertheless, you should conduct your own research before making a purchase to make sure that the tankless water heater whole house will completely suit you.

List of 8 Best Tankless Water Heater Whole House of 2018

Rating Image Name and Features Details
4.8
Thermoflow Elex 24 Electric Tankless Water Heater 1. Thermoflow Elex 24 Electric Tankless Water Heater
Instantly hot water.
Read reviews
4.5
IHeat Tankless S-16 240V 66A 16KW Stainless Steel Enclosure 7.2 by 11 by 3 1 2CPT 36 AWG 8 Electric Water Heater 2. IHeat Tankless S-16 240V 66A 16KW Stainless Steel Enclosure 7.2 by 11 by 3 1 2CPT 36 AWG 8 Electric Water Heater
Heat tank less s series can also be used in highly sterile applications like commercial kitchens, hospitals, clinics, and even schools where cleanliness is of the highest importance.
Read reviews
4.3
Atmor AT-910-24TP ThermoPro 24 kW  240V 4.6 GPM Digital Thermostatic Tankless Electric Instant Water Heater 3. Atmor AT-910-24TP ThermoPro 24 kW 240V 4.6 GPM Digital Thermostatic Tankless Electric Instant Water Heater
Requires 3 x 40a single-phase dp breakers, 3 x 8 awg wires, 240v.
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4.3
27kW 240V Electric Tankless Water Heater 4. 27kW 240V Electric Tankless Water Heater
3 x 40a single-phase dp breakers, 3 x 8 awg wires, 240v.
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3.8
Aquah 27 Kw On-demand Electric Tankless Water Heater Whole House 5. Aquah 27 Kw On-demand Electric Tankless Water Heater Whole House (Best Versatility Features)
Multi-layer heating chamber with long life span.
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3.5
Atmor AT-910-18TP Thermopro 18 Kw 240V 3.7 Gpm Digital Thermostatic Tankless Electric Instant Water Heater 6. Atmor AT-910-18TP Thermopro 18 Kw 240V 3.7 Gpm Digital Thermostatic Tankless Electric Instant Water Heater
Requires 3 x 30a single-phase dp breakers, 3 x 8 awg wires, 240v.
Read reviews
3.5
Tankless Gas Water Heater Excel Pro Propane Lpg Gas 6.6 Gpm Whole House 7. Tankless Gas Water Heater Excel Pro Propane Lpg Gas 6.6 Gpm Whole House (DIY Crafters’ Choice)
Power vented directly vertically (rooftop) or sideways (wall) via stainless steel cat iii flue 3.5″ diameter included (20″).
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3.5
IHeat Tankless AHS27-D 240V 112.5A 27KW Stainless Steel Enclosure 3 4 MIP 16 by 17 by 3.5 Electric Water Heater 8. IHeat Tankless AHS27-D 240V 112.5A 27KW Stainless Steel Enclosure 3 4 MIP 16 by 17 by 3.5 Electric Water Heater
Heat pro-performer continuously monitors all real time data collected 60 times a second through a range of sensors.
Read reviews

 

 

 
№ 1. Thermoflow Elex 24 Electric Tankless Water Heater, 24kw At 240 Volts, Instant Hot Water Heater with Self-modulating Temperature Technology for Whole House
 

Design
4/5
 

Size
5/5
 

Durability
5/5
 

Quality
5/5
 
Overall Brand Model Dimensions Weight Details
4.8
Thermoflow 17 x 4 x 9 inches 11.24 pounds
Check Price

Environment friendly – no venting required. Compared to centralised gas or oil heating systems, decentralised hot water supply can lower co2 emission up to 35 %. Self-modulating temperature technology – with the most advanced, self modulating temperature technology of german, backlit lcd digital temperature selection in 1 degree increments gives users complete control of hot water. Temperature range from 32 f to 165 f. Endless hot water – instantly hot water. You can never run out of hot water, perfect for whole house. Lowering costs & saving energy- saves up to 50% in water heating costs with the thermoflow electric tankless water heater and use up to 85% less energy than conventional storage heaters.

Notice – please verify that this model is the right size for your hot water needs and electrical requirements before purchase & installation. Dimensions: 10h x 4.5w x 18.6d inches ; weight: 9.9lb; pipes fittings: 1/2 inch npt, nominal pressure: 90psi. Electrical requirements: 24 kw.240 volts. Required breakers: 60 amp double pole. ( breakers and wire are not included ).

 

 
Pro
Self-modulating temperature technology
Environment friendly
Endless hot water
Lowering costs & saving energy
Con
There are literally no cons.
 

What if a receive a wrong item instead of the tankless water heater whole house I ordered?

There is no need to worry since the support team will help you to return your money or replace the wrong item with the chosen tankless water heater whole house. Simply contact a support agent and describe your situation to get all the required help.

 

 
 

Design
5/5
 

Size
5/5
 

Durability
3/5
 

Quality
5/5
 
Overall Brand Model Dimensions Weight Details
4.5
iHeat Tankless -P 3.5 x 7.7 x 11.5 inches 3.9 pounds
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Heat tank less s series can also be used in highly sterile applications like commercial kitchens, hospitals, clinics, and even schools where cleanliness is of the highest importance. Heat tank less s series saves valuable space with its compact size, the s series compared to tank type water heaters, is small enough to fit any under counters installations, or even closets. Heat tank less water heater saves you up to 60% on your water heating costs. The heat tank less stainless steel construction is a perfect fit for any applications near the ocean, like beach front properties, yachts, small boats, resorts and outdoor kitchens.

Dimensions: 11.5 x 9 x 4.5 inches.

 

 
Pro
Heat tank less s series saves valuable space
The heat tank less stainless steel construction is a perfect fit
Con
You will need a big enough car to transport it.
 

What should be the warranty period for a good tankless water heater whole house?

You should buy tankless water heater whole housefrom brands with customer-friendly warranty policy. Trustworthy tankless water heater whole house manufacturers offer two-year or even longer warranty period. You would not have any problems in case of any issues — simply take a broken product to the service center to get it replaced or fixed.

 

 
 

Design
4/5
 

Size
3/5
 

Durability
5/5
 

Quality
5/5
 
Overall Brand Model Dimensions Weight Details
4.3
Atmor AT-910-24TP 17.4 x 5.2 x 13.4 inches 19.05 pounds
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Digital temperature control allows you to set your temperature in increments of 1 . Specially equipped to heat incoming water as low as 37 f at 2.45 gpm. Save up to 50% on electric bills compared to a traditional tank water heater. Requires 3 x 40a single-phase dp breakers.3 x 8 awg wires.240v. Industries only unit to receive splash-proof ip54 certification, allowing point of use installation near showers and sinks.

 

 
Pro
Specially equipped
Requires 3 x 40a single-phase dp breakers.3 x 8 awg wires.240v
Digital temperature control allows you
Industries only unit
Con
The product will not survive a fall.
 

 

 
№ 4. 27kW 240V Electric Tankless Water Heater, 5.1gpm 112.3 Amps, Thermopro Series with Digital Thermostatic Control
 

Design
4/5
 

Size
5/5
 

Durability
5/5
 

Quality
3/5
 
Overall Brand Model Dimensions Weight Details
4.3
Atmor AT-910-27TP 17.4 x 5.2 x 13.4 inches 18.9 pounds
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Digital temperature control allows you to set your temperature in increments of 1 degree. Thermostatic control range from 90-135 degrees. Specially equipped to heat incoming water as low as 37 degrees at 2.2 gpm. Save up to 50% on electric bills compared to a traditional tank water heater. Stainless steel interior is durable and corrosion resistant allowing for heat efficiency and longer life expectancy. Electrical requirements: 3 x 40a single-phase dp breakers.3 x 8 awg wires.240v.

 

 
Pro
Stainless steel interior is durable
Digital temperature control allows you
Specially equipped
Electrical requirements
Con
May be expensive for some people.
 

Do I need to worry when buying a tankless water heater whole house online?

Many people use online shopping every day. It is absolutely safe because you are secured by layers of customer protection programs. You are not risking anything by ordering a tankless water heater whole house since you can easily return it and receive your money back. We see no reason to worry while ordering goods online — it is a convenient, cheap, quick, and, of course, safe method of shopping.

 

 
 

Design
2/5
 

Size
3/5
 

Durability
5/5
 

Quality
5/5
 
Overall Brand Model Dimensions Weight Details
3.8
AQUAH AQS-27 15 x 3.5 x 11 inches 20 pounds
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Multi-layer heating chamber with long life span; electric leakage protection; anti scaling mechanism, and over temperature/water pressure protection; stainless steel case and front cover for durability, splash proof, and corrosion resistance; . Led touch screen to show the heater’s working condition, output water temperature, running time and power/water consumption; water temperature displayed in either fahrenheit or celsius; fault auto-detection technique for the convenience of trouble shooting. Direct temperature setting, consistent output water temperature regulated by thermostat, and temperature settings automatically memorized to avoid repeated operations; .

Aquah aqs-27 electric tankless water heater; etl certified; patented technology, enclosed loop heating system with less heat loss, nano insulation material to completely separate water from electricity; .

 

 
Pro
Led touch screen
Direct temperature setting
Aquah aqs-27 electric tankless water heater
Multi-layer heating chamber
Con
You will not be able to use it on the daily basis.
 

 

 
 

Design
4/5
 

Size
3/5
 

Durability
4/5
 

Quality
3/5
 
Overall Brand Model Dimensions Weight Details
3.5
Atmor AT-910-18TP 17.4 x 5.2 x 13.4 inches 19.15 pounds
Check Price

Digital temperature control allows you to set your temperature in increments of 1 . Specially equipped to heat incoming water as low as 37 f at 1.9 gpm. Industries only unit to receive splash-proof ip54 certification, allowing point of use installation near showers and sinks. Save up to 50% on electric bills compared to a traditional tank water heater. Requires 3 x 30a single-phase dp breakers.3 x 8 awg wires.240v.

 

 
Pro
Digital temperature control allows you
Requires 3 x 30a single-phase dp breakers.3 x 8 awg wires.240v
Specially equipped
Industries only unit
Maximum temperature
Con
The product will not survive a fall.
Similar products are much cheaper.
 

 

 
№ 7. Tankless Gas Water Heater Excel Pro Propane Lpg Gas 6.6 Gpm Whole House and for Hydronic Heating Compare to Rinnai, Rheem, Noritz, Bosch Free Flue Kit
 

Design
3/5
 

Size
2/5
 

Durability
4/5
 

Quality
5/5
 
Overall Brand Model Dimensions Weight Details
3.5
gasFlex 14.5 x 5.5 x 23 inches 69 pounds
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Power vented directly vertically (rooftop) or sideways (wall) via stainless steel cat iii flue 3.5″ diameter included (20″). Certified for installation in manufactured (mobile) homes pure copper heat exchanger. Modulates heat output in response to the flow rate of water running through the unit. Propane gas – up to 140.000 powerful btu’s of heating power. Delivers 6.6 gpm of hot water with a 35 f instant temperature rise.

 

 
Pro
Modulates heat output in response
Delivers 6.6 gpm
Propane gas
Power vented directly vertically
Con
Quickly becomes wet due to cheap materials.
 

 

 
 

Design
4/5
 

Size
4/5
 

Durability
4/5
 

Quality
2/5
 
Overall Brand Model Dimensions Weight Details
3.5
iHeat Tankless -P 3 x 17 x 16 inches 21.4 pounds
Check Price

His tank less water heater is so powerful it can effortlessly run 2 to 3 standard showers at 1 time in the southern states where the incoming water temperatures a warmer. Heat ahs27-d includes a touch screen display where you have the ability to use a range of functions from setting your desired temperature to even programming certain max temp settings. Heat pro-performer continuously monitors all real time data collected 60 times a second through a range of sensors. Heat software will allow you to run a full diagnostics of the unit without having to open the unit, only a memory stick, and a laptop or tablet to insert for complete diagnostic report.

Heat pro-performer boasts a 3/4 in. Inlet and outlet which makes it a breeze for high flow applications.

 

 
Pro
Heat software will allow you
Heat pro-performer boasts a 3/4 in
Con
Its counterparts are less expensive.
 

How did you create this rating list with the best tankless water heater whole house?

We sincerely wanted to help our readers, so our team spent many hours comparing various tankless water heater whole housefrom different manufacturers. It was not easy, since we had to find a way to include both cheap and expensive tankless water heater whole housein our rating list. That is why we decided to make the price/quality ratio the determining factor. No matter what your budget is, you can use our guide to choose the best tankless water heater whole house in the preferred price category.

What do I need to check before choosing a tankless water heater whole house?

Marketplace provides a myriad of convenient features to help you compare and choose tankless water heater whole house. It also aggregates thousands of reviews from people all over the world. Always read them before choosing a tankless water heater whole house!

Meet the Author
My name is Erik Neal and I am a House Cleaner. I graduated from University of North Dakota - Grand Forks, North Dakota

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