6 Best Electric Water Heater for Radiant Floor Heat in 2024

George Guay
Last updated on: January 4, 2024

Summary

Image
Model
Features
Takagi T-KJr2-IN-LP Indoor Tankless Water Heater
  • Vent Type: Direct Vent; Water Connection Location: Bottom; Water Connection: 3/4 Inch
  • Item Weight:38 pounds; Safety functions include freeze, overheat, rising defence, and troubleshooting diagnostic codes
  • 140,000 BTU
  • 6.6 GPM max flow rate
  • 4-Inch classification III stainless steel venting needed
  • Inlet, outlet thermistors for consistent temperature level tracking
  • Energy factor of 0.81-0.83.
Check Price
Ecosmart ECO 18 Electric Tankless Water Heater
  • The product is extremely long-lasting.
  • The product is easy to use.
  • Produced in China.
  • Copper and stainless components.
  • Lifetime warranty for residential use.
  • Conserve up to 60% on your water heating costs with the most sophisticated, self-modulating technology readily available.
  • Never run out of warm water with an ECOSMART tankless water heater.
Check Price
Takagi T-H3-DV-N Condensing High Efficiency Natural Gas Indoor Tankless Water Heater
  • Unlimited warm water, On-demand use, Compact, Space-saving, Energy preservation.
  • Digital safety functions, No pilot light to have to worry about.
  • Security functions include freeze, overheat, surge security, and troubleshooting diagnostic codes.
  • Satisfies the 2012 SCAQMD Rule 1146.2 for Ultra-Low NOx Emissions.
  • Primary heat exchanger utilizes commercial-grade copper alloy for 25 times much better heat transfer than stainless steel.
Check Price
Rinnai RUCS75iN Tankless Water Heaters, RUCS75iN-Natural Gas/7.5 GPM
  • Endless hot water for your entire house.
  • RUCS75iN SE Super High-Efficiency Tankless Hot Water Heater – Natural Gas: Indoor Installation Only.
  • Approximately 7.5 GPM hot water circulation rate (differs by groundwater temp).
  • Control-R 2.0 mobile app features timers and the schedules throughout the day and enables you to from another location put the system into the trip mode.
Check Price
Rheem RTEX-18 18kW 240V Electric Tankless Water Heater, small
  • External digital thermostatic control with LED display (+/1-degree precision).
  • Most innovative self-modulation, change power to satisfy hot water need.
  • Long-lasting Copper immersion two heating elements, field Serviceable. Flow Rate- as much as 4.4 GPM.
  • Simple setup– bottom 3/4 inch NPT water connections.
  • It is threaded for easy replacement, simple installation, digital temperature display.
Check Price
Rinnai RU199iN Tankless Water Heaters
  • Unlimited hot water for your whole house.
  • RU199in Sensei SE+ Super High-Efficiency Tankless Hot Water Heater – Natural Gas: Indoor Installation Only.
  • Approximately 11 GPM warm water flow rate (varies by groundwater temperature).
  • The Circ-Logic technology allows you to set the recirculation patterns that coincide with your common practices. When you require it, hot water is readily available!
Check Price
Summary
Takagi T-KJr2-IN-LP Indoor Tankless Water Heater
  • Vent Type: Direct Vent; Water Connection Location: Bottom; Water Connection: 3/4 Inch
  • Item Weight:38 pounds; Safety functions include freeze, overheat, rising defence, and troubleshooting diagnostic codes
  • 140,000 BTU
  • 6.6 GPM max flow rate
  • 4-Inch classification III stainless steel venting needed
  • Inlet, outlet thermistors for consistent temperature level tracking
  • Energy factor of 0.81-0.83.
Check Price
Ecosmart ECO 18 Electric Tankless Water Heater
  • The product is extremely long-lasting.
  • The product is easy to use.
  • Produced in China.
  • Copper and stainless components.
  • Lifetime warranty for residential use.
  • Conserve up to 60% on your water heating costs with the most sophisticated, self-modulating technology readily available.
  • Never run out of warm water with an ECOSMART tankless water heater.
Check Price
Takagi T-H3-DV-N Condensing High Efficiency Natural Gas Indoor Tankless Water Heater
  • Unlimited warm water, On-demand use, Compact, Space-saving, Energy preservation.
  • Digital safety functions, No pilot light to have to worry about.
  • Security functions include freeze, overheat, surge security, and troubleshooting diagnostic codes.
  • Satisfies the 2012 SCAQMD Rule 1146.2 for Ultra-Low NOx Emissions.
  • Primary heat exchanger utilizes commercial-grade copper alloy for 25 times much better heat transfer than stainless steel.
Check Price
Rinnai RUCS75iN Tankless Water Heaters, RUCS75iN-Natural Gas/7.5 GPM
  • Endless hot water for your entire house.
  • RUCS75iN SE Super High-Efficiency Tankless Hot Water Heater – Natural Gas: Indoor Installation Only.
  • Approximately 7.5 GPM hot water circulation rate (differs by groundwater temp).
  • Control-R 2.0 mobile app features timers and the schedules throughout the day and enables you to from another location put the system into the trip mode.
Check Price
Rheem RTEX-18 18kW 240V Electric Tankless Water Heater, small
  • External digital thermostatic control with LED display (+/1-degree precision).
  • Most innovative self-modulation, change power to satisfy hot water need.
  • Long-lasting Copper immersion two heating elements, field Serviceable. Flow Rate- as much as 4.4 GPM.
  • Simple setup– bottom 3/4 inch NPT water connections.
  • It is threaded for easy replacement, simple installation, digital temperature display.
Check Price
Rinnai RU199iN Tankless Water Heaters
  • Unlimited hot water for your whole house.
  • RU199in Sensei SE+ Super High-Efficiency Tankless Hot Water Heater – Natural Gas: Indoor Installation Only.
  • Approximately 11 GPM warm water flow rate (varies by groundwater temperature).
  • The Circ-Logic technology allows you to set the recirculation patterns that coincide with your common practices. When you require it, hot water is readily available!
Check Price
Table of Contents

A convenient and economical way of evenly distributing heat everywhere in your living space is radiant floor heating. Let us admit, there are so many options for the best electric water heater for radiant floor heat, and it looks like, in modern times, when the internet is booming, the choices are endless. The research process is so hard and very time taking; we know your struggle. That is why we set out to make a proper buyer’s guide for you to choose a quality water heater for warming your floors.

Getting the right water heater is essential to ensure that you consistently get comfortable temperatures in the complete home. Not every model can do that, but our handpicked options from the lot successfully serve this purpose. So, let us jump right into our collection of the best electric water heaters for radiant floor heat without any further inconvenience.

Factors to Consider while Buying an Electric Water Heater

Here are the criteria that your selected model should meet so that it can enable efficient radiant floor heating:

Water Heaters Variants

There are two variants of electric water heaters out there that you can choose from. One variant is a Tank-style electric water heater, and the other one is a tankless electric water heater. Both of these variants have their specific pros and cons and are designed for certain needs. But in modern times, tankless versions are more popular due to their energy-saving capabilities. Any of the models can be used for efficiently warming your homes. 

Power Source

Make sure that your selected model is based on an electrical power source. It is best suited for those houses where a gas connection is unavailable. You can get your hands on any of our recommended picks as all of these are electricity-powered water heaters and serve their purpose well. Plus, they are better than gas water heaters as they are much quicker and easier to install and have low energy consumption.

Heating Power

Note the healing power of the heater while purchasing it. The power is usually mentioned in kWs. More the power it has, the more your room will be warmed. So, go for a model that has the highest heating power for great performance. 

Price

Consider the cost while searching for a quality electric water heater. The model with more features and perks will cost more, but it’s not about the features always; your requirements matter the most if a model fulfills your requirements, just for it without any second thought. Tankless models are generally more expensive than tank-style models, but the investment is a smart move as they are more efficient and run for a long period of time. 

Warranty

Never buy a heater without a strong warranty. If the warranty is not there, it means that the heater is not a reliable one and will become faulty in no time. Branded heaters do come with a warranty, which ensures that they are confident about the claims and features they offer in their product. 

1Takagi T-KJr2-IN-LP Indoor Tankless Water Heater

The T-KJr2 design is the tiniest system in the Takagi line-up. The T-KJr2 is ideal for the light property (i.e. studio apartment units) and radiant heating applications.

Features:

  • Vent Type: Direct Vent; Water Connection Location: Bottom; Water Connection: 3/4 Inch
  • Item Weight:38 pounds; Safety functions include freeze, overheat, rising defence, and troubleshooting diagnostic codes
  • 140,000 BTU
  • 6.6 GPM max flow rate
  • 4-Inch classification III stainless steel venting needed
  • Inlet, outlet thermistors for consistent temperature level tracking
  • Energy factor of 0.81-0.83.
Editor Rating:
View on amazon

Pros

  • Stainless steel venting.
  • Complies with gas Low.
  • NOx emissions of 40 ng/J or55 ppm.

Cons

  • Will not work at high elevation.

2Ecosmart ECO 18 Electric Tankless Water Heater

This Smart Technology electric tankless water heater is configured as a “whole home” design for environments where inbound water temperature level is 62 ° F and above. The ECO 18 is capable of the heating over 2.5 gallons per minute, which is equivalent of one water saver shower head (with the 1.5 GPM flow) and one sink with the low inlet water temperature of 62 ° F, and an output setting of 105 ° F. Two showers releasing no more than 1.5 GPM each can be run all at once when the incoming water temperature is above 70 ° F. Digital temperature control allows you to set your temperature level in increments of 1 °. All tankless water heater are sized based on flow rate and temperature increase, and there is a direct relationship between the two. If utilized in a cold location requiring a high-temperature level rise, it will be more minimal in the number of components (gallons per minute) it can heat up at one time compared to a warmer climate. When sized correctly, it will provide unlimited hot water and only consume the energy needed, offering the user total control.

Features:

  • The product is extremely long-lasting.
  • The product is easy to use.
  • Produced in China.
  • Copper and stainless components.
  • Lifetime warranty for residential use.
  • Conserve up to 60% on your water heating costs with the most sophisticated, self-modulating technology readily available.
  • Never run out of warm water with an ECOSMART tankless water heater.
Editor Rating:
View on amazon

Pros

  • Durable thanks to excellent products it’s made from.
  • Features a lifetime service warranty.
  • Self-modulating innovation.
  • Assists you save approximately 60% on water heating expenses.

Cons

  • Some users have reported water leaking from the bottom of the unit.
  • Issues with mineral built-up (requires to be eliminated sometimes).

3 Takagi T-H3-DV-N Condensing High Efficiency Natural Gas Indoor Tankless Water Heater

The T-H3-DV-N is well matched for residential/ commercial applications such as small restaurants and beauty parlour. Complies with Ultra-Low NOx regulations. Utilizing business grade copper alloy for the heat exchanger tubing, the T-H3 is likewise appropriate for much heavier property usages such as area heating or domestic recirculation systems. Certified as much as 10,100 ft. elevation. With gas inputs of 199,000 BTU, the T-H3 can produce sufficient hot water for four bathrooms in warmer environments or three baths in chillier environments.

Features:

  • Unlimited warm water, On-demand use, Compact, Space-saving, Energy preservation.
  • Digital safety functions, No pilot light to have to worry about.
  • Security functions include freeze, overheat, surge security, and troubleshooting diagnostic codes.
  • Satisfies the 2012 SCAQMD Rule 1146.2 for Ultra-Low NOx Emissions.
  • Primary heat exchanger utilizes commercial-grade copper alloy for 25 times much better heat transfer than stainless-steel, Integrated controls and power cable as standard functions.
Editor Rating:
View on amazon

Pros

  • 10 GPU’s of water flow.
  • Compact design.
  • Features automated safety features.
  • Conserves energy.

Cons

  • Some users have reported technical problems with the computer system part.
  • It takes a lot of time for the water to warm up.

4Rinnai RUCS75iN Tankless Water Heaters, RUCS75iN-Natural Gas/7.5 GPM

Delight in an endless supply of warm water with the RUCS75iN, our Super-High Efficiency condensing gas tankless hot water heater from Rinnai. Only the size of the small suitcase, the RUCS75iN is compact, perfect and easy-to-install for indoor areas.

Features:

  • Endless hot water for your entire house.
  • RUCS75iN SE Super High-Efficiency Tankless Hot Water Heater – Natural Gas: Indoor Installation Only.
  • Approximately 7.5 GPM hot water circulation rate (differs by groundwater temp).
  • Control-R 2.0 mobile app features timers and the schedules throughout the day and enables you to from another location put the system into the trip mode.
Editor Rating:
View on amazon

Pros

  • Wi-Fi Capable.
  • Works with both gas and gas.
  • The minimum circulation rate is 0.26 GPM (1 l/min).
  • The maximum flow rate of 7.5 GPM (28.4 l/min).

Cons

  • The small increase in the time till warm water, require for condensation drain.

5Rheem RTEX-18 18kW 240V Electric Tankless Water Heater, small

This water heater offers fast, continuous hot water on demand for single point-of-use or numerous applications. The Robust copper immersion heating elements with the brass top boost toughness and are threaded for easy replacement. Digital temperature control permits you to set your temperature in increments of 1 °.

Features:

  • External digital thermostatic control with LED display (+/1-degree precision).
  • Most innovative self-modulation, change power to satisfy hot water need.
  • Long-lasting Copper immersion two heating elements, field Serviceable. Flow Rate- as much as 4.4 GPM.
  • Simple setup– bottom 3/4 inch NPT water connections.
  • It is threaded for easy replacement, simple installation, digital temperature display.
Editor Rating:
View on amazon

Pros

  • Warms up cold Chicago well water with no difficulty (approximately 1 shower + 1 faucet at the same time).
  • Digital dial control is nice.
  • No tank, no anode rod.

Cons

  • Fluctuating temperature level.
  • Causes flickering in dimmable LED light bulbs.
  • Can only handle 1 shower + 1 sink faucet at once.
  • It does take a few seconds for the water to warm up.

6 Rinnai RU199iN Tankless Water Heaters

With a boosted combustion style, the Rinnai Sensei tankless water heater provides a better experience for both users and installers. Like all Rinnai tankless water heaters, it’s likewise vertically integrated. That implies all essential parts are made by Rinnai– to ensure Rinnai quality.

Features:

  • Unlimited hot water for your whole house.
  • RU199in Sensei SE+ Super High-Efficiency Tankless Hot Water Heater – Natural Gas: Indoor Installation Only.
  • Approximately 11 GPM warm water flow rate (varies by groundwater temperature).
  • The Circ-Logic technology allows you to set the recirculation patterns that coincide with your common practices. When you require it, hot water is readily available!
Editor Rating:
View on amazon

Pros

  • Fast to warm up (within 1 minute 2 floorings above).
  • Endless circulation of warm water.
  • Can have 2 showers working.
  • It is quiet.

Cons

  • Some users have complained about the Ordering process.

FAQ's

What is a cheap floor heating system?

There is no such thing as a cheap floor heating system. An electric water heater for radiant floor heat is a great alternative to the conventional gas and oil water heater. This substitute is a cheap, convenient, long-lasting, and reliable one. See our collection as all of our picked models are budget-friendly. 

What is the best water heater for a small family?

It depends on your needs and personal preferences. See what are your requirements and budget and then select an electric water heater for your home. You can choose a model from our recommended picks as all of them are of excellent quality and from premium brands. See which model suits you perfectly and then purchase it.

Is it safe to leave an electric space heater on overnight?

If your electric space heater is properly certified by authentic organizations, it can be safe to use overnight while sleeping. It must-have features like the adjustable thermostat, auto shutoff, shut-off timer, and tip-over protection so that you can use it without any fear or worry. If your heater lacks certification, don’t use it overnight.

Are tankless water heaters safe?

In general, yes, tankless water heaters are safe in comparison to tank storage water heaters. As there is no tank in the heating system that can experience a huge spike in pressure or overheat, there isn’t any danger of exploding and bursting. Hence, it is a safe machine if you have children.

What are the best ways to save energy and reduce bills?

One of the best ways to save energy and reduce bills is to get your hands on the best electric water heater for radiant floor heat. They are not only long-lasting but also don’t need any sort of maintenance for quite some time. They are also better than gas and other conventional water heaters due to a number of reasons. 

Conclusion

For providing your household with a reliable and steady stream of hot water, wonders can be done by the right electric water heater. Such a quality heater can not only provide you a lot of warm water but also save you a fortune in electricity and gas bills for quite some time. Nowadays, people have started to use electric water heaters for radiant floor heat due to various reasons, as discussed before. Other methods of heating are very costly and difficult to install, as well as time taking. Therefore, it is a wise move to invest in the best electric water heater for radiant floor heat. We have put together some fine electric water heaters with which you can upgrade your home. 

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