Aug 26, 2020

Best 40 Gallon Hot Water Heaters Review & Buyer’s Guide 2021

If you are considering to buy a best 40 gallon hot water heaters, you should go through the following list of best 40 gallon hot water heaters.

In a Hurry !! and want a quick review here is our editors pick

Editor’s Pick

EcoSmart ECO 11 Modulating Technology

Top 10 40 gallon hot water heaters

IMAGE PRODUCT Rating

4.1 out of 5 stars, 855 customer reviews Check Best Price

3.2 out of 5 stars, 203 customer reviews Check Best Price

3.7 out of 5 stars, 9 customer reviews Check Best Price

4.7 out of 5 stars, 594 customer reviews Check Best Price

4.8 out of 5 stars, 14 customer reviews Check Best Price

4.1 out of 5 stars, 54 customer reviews Check Best Price

4.4 out of 5 stars, 625 customer reviews Check Best Price

4.1 out of 5 stars, 48 customer reviews Check Best Price

4.3 out of 5 stars, 121 customer reviews Check Best Price

4.0 out of 5 stars, 100 customer reviews Check Best Price

Best 40 gallon hot water heaters

1. EcoSmart ECO 11 Modulating Technology

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EcoSmart ECO 11 Modulating Technology
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  • Lifetime warranty
  • Save up to 60-percent on your water heating cost with an ECOSMART electric tankless water heater
  • Never run out of hot water with an ECOSMART tankless water heater
  • Patented Self Modulating Technology and design
  • ECOSMART tankless water heaters are 99.8-percent energy efficient.Uniform Energy Factor:0.98

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2. Ecosmart POU 3 5 Electric Tankless

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Ecosmart POU 3 5 Electric Tankless
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  • Can provide hot water for one sink at 0.5 GPM in warmer climates
  • Requires 1 x 30 amp breaker and 10 AWG wire
  • For one sink at 0.5 GPM in colder climates the POU 6 is recommended
  • Amperage Draw 29 amp

3. Smith GCR 40 ProMax Efficiency Heater

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Smith GCR 40 ProMax Efficiency Heater
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  • Blue Diamond glass coating provides superior corrosion resistance to industry-standard glass lining
  • Self-powered electronic gas valve uses thermopile to generate power needed to operate the electronic gas control without requiring external power
  • Internal microprocessor provides enhanced operating parameters and tighter differentials for precise sensing and faster heating response
  • Dynaclean diffuser dip tube helps reduce lime and sediment buildup, maximizes hot water output; made from long-lasting PEX cross-linked polymer
  • Meets all current regulations set forth by the National Appliance Energy Conservation Act (NAECA)

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4. Corro Protec CP R Heater Powered Titanium

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Corro Protec CP R Heater Powered Titanium
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  • Say Goodbye to Odors — Eliminate your water heat odor problem by removing the rotten egg smell caused by hydrogen sulfide with our advanced powered anode rod.
  • Permanent Corrosion Protection — Designed to replace your 40-80-gallon water heater’s hex head anode rod, it can help defend against any level of water hardness.
  • Energy Efficient Design — By reducing mineral accumulation on the tank it can help improve the water quality while reducing stress on the tank to reduce energy costs.
  • Quick and Easy Installation — We’ve included an easy-to-follow paper and step-by-step online PDF instructions to make installing your anode rod much easier.
  • North American Quality — Manufactured right here in North America, our hot water heater anode rod not only extends the life of your tank but is backed by a 20-year warranty.

5. Tankless Electric ECOTOUCH Self Modulating Instant

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Tankless Electric ECOTOUCH Self Modulating Instant
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  • 【INSTANT & SUFFICIENT HOT WATER】Applied with 9kW heating system, the electric tankless water heater ECO90B supplies instant & endless hot water of 116℉or higher temp, no waiting for preheat nor temperature fluctuations, perfect companion for sinks, bringing you perfect experience of comfort and relaxing.
  • 【SMART SELF MODULATION】The on demand electric water heater ECO90B adjusts power input based on flow rate and temp setting in real time. As water flow reduces, power input decreases, thus you still get ideal, comfortable temp instead of scalding hot water. Optimal energy efficiency 99.8% saves considerable electricity charge per year.
  • 【UPGRADED HEATING SYSTEM】Featuring micro-computer control and patent heating technology, ECO90B electric water heater promises no “cold water sandwiching”. And unique heating element avoids any corrosion inside pipes so as to extend service lifespan.
  • 【SAFE AND DURABLE】Applied with multiple protection devices, every piece ECO90B tankless water heater goes through strict tests to ensure 100% safety. Inner water and electricity lines are designed to run separately so as to avoid leakage or harm of scale build up. Approval by ETL and qualifies for UL, you can expect outstanding performance for years to come.
  • 【CONVENIENT USE】The ECO90B electric tankless water heater comes with digital display & touch control panel so temp setting is an easy job. It’s space saving, measuring: 15.74”³H x 10.24”³W x 2.05”³ D. Plus it has a stylish, modern design that blends in any decor. Please verify it is the right size for you: 9kW@240V; pipes fittings: 1/2″ NPT.

6. Eemax EEM24018 Electric Tankless Heater

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Eemax EEM24018 Electric Tankless Heater
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  • Tankless water heaters provide a continuous Supply of hot water and only heats the water you need, when you need it
  • Instant, consistent and endless hot water
  • The most advanced, self-modulating technology available, meaning the unit will adjust how much energy needs to be input based on how much hot water is needed
  • Compact size saves valuable storage space; Resistant and stylish with digital temperature control in increments of 1°F ranging from 80°F to 140°F
  • Before purchase and installation, Please verify that this EEM24018 is the correct size for your hot water needs.Rated Pressure: 25psi minimum; 150psi maximum

7. Stiebel Eltron 24 Tempra Plus

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Stiebel Eltron 24 Tempra Plus
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  • Digital temperature control. Voltage : 240 Volt or 208 Volt
  • Proven reliability
  • No venting required
  • Sleek design fits anywhere
  • Save at least 15-20% on the hot water portion of your electric bill

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8. iHeat Tankless Stainless Enclosure Electric

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iHeat Tankless Stainless Enclosure Electric
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  • 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
  • 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.Water proof construction allows you to easily and safely control the temperature by using our water proof interactive touch pad
  • Dimensions: 11.5 x 9 x 4.5 inches

9. Rheem Heating RTEX 13 Residential Tankless

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Rheem Heating RTEX 13 Residential Tankless
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  • External adjustable digital thermostatic control with LED display (+/1 degree accuracy
  • Durable Copper immersion two heating elements, field Serviceable.Self-modulating power control
  • Simple installation — 1/2 NPT adapters included; side 1/2 inch Compression water connections
  • 99.8% energy efficient. External controls to adjust temperature in increments of 1°f. Water-Saver Shower Head — 1.5 GPM
  • Threaded for easy replacement, simple installation, digital temperature display 54 A. 13kW Model Flow Rate: up to 3.17 GPM
  • 54 A

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10. Eccotemp i12 NG Tankless Water Heater

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Eccotemp i12 NG Tankless Water Heater
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  • Whole home indoor, gas powered tankless water heater, rated at 3 GPM that activates only on demand and no pilot light needed, reducing energy consumption
  • Sleek, modern design with black tempered glass front panel featuring an easy to use LED display controls
  • Features fully automatic temperature controls with an energy saving mode and child lock technology
  • Safe electronic ignition system; Plugs into standard 110v electrical outlet with UL-listed cord. Field tested to 5500 ft. elevation (not recommended to be used any higher)
  • Uses standard 1/2″ NPT water fittings and comes with horizontal venting allowing for a convenient and quick installation

Final Verdict

However, if you are new to purchasing a 40 gallon hot water heaters , you can surely make a mistake as there are several options available in the market. That is why we have provided buying guide of 40 gallon hot water heaters to you. Read it carefully to make a wise choice and save your money from going waste.
If you haven’t got much time, then we recommend to go through our list of top 40 gallon hot water heaters. This has been carefully curated after a long research and analysis. As per our choice, has grabbed the first place. It’s amazing features and specifications deserved first position.
Which did you choose? Have you been using any of these 40 gallon hot water heaters? Share your feedback and comments in the below section. We shall reply to your queries as soon as possible.