Best 40 gallon water heater [Detailed Reviews]

Seeking for the best 40 gallon water heater? We hear you.

Here at ReviewCity.club we understand that choosing a 40 gallon water heater may be hard.

Because of this, we strive to help you get the best product by gathering information, experimenting, and writing comprehensive reviews.

Last updated on February 12, 2021 11:11 am

Due to the extensive analysis, we selected the best merchandise and we put together a list of the top 40 gallon water heater on the market.

Our best pick is Excel Pro Tankless Gas Water Heater NATURAL GAS 6.6 GPM Whole House and for Hydronic heating Compare to Rinnai, Rheem,Noritz, Bosch FREE FLUE KIT. Yet, every product we reviewed is of good quality.

See the chart we crafted for you and read below to see what we uncovered when we looked through the top 10 40 gallon water heater.

Best 40 gallon water heater Reviewed

Here you can find the complete reviews.

A.O. Smith GCR-40 ProMax Plus High Efficiency Gas Water Heater, 40 gal

$736.67  in stock
2 new from $568.02
Buy Now
Amazon.com
as of February 12, 2021 11:11 am

Features

  • 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)

EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating Technology

$277.00
$210.65  in stock
15 new from $210.65
6 used from $173.51
Free shipping
Buy Now
Amazon.com
as of February 12, 2021 11:11 am

Features

  • 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

PERSUPER Aquarium Heater, 100W/200W Submersible Heater Fish Tank 10-40 Gallon Heater for Betta Turtle Adjust Thermostat Water Heater 68 to 94°F Fast Heating Temperature Controller with LED Display

$24.99
$22.99  in stock
1 new from $22.99
Free shipping
Buy Now
Amazon.com
as of February 12, 2021 11:11 am

Features

  • Accurate Temperature Control: the intelligent IC chip is used for the aquarium heater. Press and hold the temperature control button for 3 seconds, switch between Fahrenheit and Celsius to control the temperature between 68 ° f / 20 ° C and 94 ° f / 34 ° C; this heater provides the best living environment for aquatic organisms.
  • Safety Assurance: it adopts the highest waterproof grade IP68, explosion-proof, and anti-corrosion. When heating, it is more resistant to damage than the traditional glass heater and has the function of overheating and water shortage protection. External temperature controller: touch the button controller to adjust the temperature without wetting your hands.
  • Constant Temperature Function: when the water temperature reaches the specified temperature, the smart system will automatically stop heating, when the water temperature is lower than the set temperature, it will automatically start heating.
  • Easy to Use: submersible heaters are suitable for all types of aquariums; they are installed vertically or horizontally to ensure that the equipment is completely submerged. The heating rod shall be completely immersed in water and cannot be heated without water. Please unplug the power supply when cleaning the fish tank or replacing the water in the fish tank.
  • Wide Compatibility: aquarium heater with CE, FCC, and ROHS certification, plug with UL certification; suitable for fresh water and marine aquarium, aquaculture, glass containers, and aquaculture system. 12 months warranty, 24-hour professional after-sales service.

Bradford White 40 Gallon Natural Gas Water Heater #RG240T6N

$600.99  in stock
1 new from $600.99
Buy Now
Amazon.com
as of February 12, 2021 11:11 am

Features

  • Bradford White ICON System
  • Advanced ScreenLok Technology Flame Arrestor Design
  • Resettable Thermal Switch
  • Maintenance-Fre
  • Factory-Installed Hydrojet Total Performance System

Bradford White BWC RE340S6-1NCWW 40GAL 240V

$883.59  in stock
2 new from $883.59
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Amazon.com
as of February 12, 2021 11:11 am

Features

  • Protective magnesium anode rod provides added protection against corrosion for long trouble free service
  • The package length of the product is 30 inches
  • The package width of the product is 30 inches
  • The package height of the product is 60 inches

Ant Enterprises Reflective Water Heater Blanket Jacket Insulation Fits 40 Gallon Tank R Value 6 (Tape)

$38.38  in stock
3 new from $38.38
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Amazon.com
as of February 12, 2021 11:11 am

Features

  • Step by Step Instructions Included.

Excel Pro Tankless Gas Water Heater NATURAL GAS 6.6 GPM Whole House and for Hydronic heating Compare to Rinnai, Rheem,Noritz, Bosch FREE FLUE KIT

$498.00
$399.00  in stock
1 new from $399.00
Buy Now
Amazon.com
as of February 12, 2021 11:11 am

Features

  • Modulates heat output in response to the flow rate of water running through the unit.
  • Power vented directly vertically (rooftop) or sideways (wall) via Stainless Steel CAT III Flue 3.5" Diameter Included (20")
  • NATURAL GAS - European Model - Digital Display is in Celsius
  • Delivers 6.6 gpm of hot water with a 35°F Instant Temperature Rise (Equivalent to 5.5gpm with a 45F temp Rise)
  • Certified for Installation in Manufactured (Mobile) Homes Pure Copper Heat Exchanger

HOT WATER TANK HEATER INSULATION JACKET DIY 'PREMIUM' KIT :ENERGY SAVING REFLECTIVE FOIL FITS 40 GALLON/180 LITRES. MANUFACTURER OF THIS KIT FOR 27 YEARS. EXCLUSIVELY SOLD BY 'JR GLOBAL SALES' ONLY

$38.88  in stock
9 new from $38.88
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Amazon.com
as of February 12, 2021 11:11 am

Features

  • Patented Reflective Foil Stops 97% of Radiant Heat Loss and helps maintain standby water temperature.Original Manufacturer of this Kit for 27 years.Average Consumer Payback is 6-12 months. Improves the Energy Efficiency of your home.
  • The Reflective Foil used in this Kit is Commercial Grade. It has been certified and tested to not give off dangerous toxins when heated. It is also Fire Rated. This is not your typical Reflective Foil you would buy in your local Hardware Store. Buyer beware. Sold only by JR Global Sales
  • Complete Kit is 'Fire Rated'. No 'Foam' Spacers (fire hazard),No Fiberglass. Non-Toxic,No Carcinogenics,No Fibers,'Class 1/Class A' Fire Rating.Suitable for both Gas and Electric Hot Water Tanks.
  • DO-IT-YOURSELF Complete Kit comes with: Foil Body(48" height x 76" circumference),Foil Spacers, Foil Tape. Easy to follow Instructions.Comes complete with all material and step-by-step instructions. Tools required,Tape Measure,Utility Knife/Scissors and Straight edge.Lightweight,clean,easy to install.ALSO AVAILABLE IN OUR 50-60 Gallon DIY KIT.
  • EXCLUSIVELY Sold by JR Global Sales 'ONLY'. ORIGINAL MANUFACTURES OF THIS KIT FOR 27 YEARS. Any other Sellers advertising this same product here are sending another 'totally' different product that may not be 'Tested' or 'Fire Rated' for safety. PLEASE BE AWARE.

NICREW Mini Submersible Aquarium Heater, Digital Temperature Display Fish Tank Heater with Adjustable External Controller, Suitable for Freshwater & Saltwater Tank up to 40 Gallon, 150W

$16.99  in stock
1 new from $16.99
Free shipping
Buy Now
Amazon.com
as of February 12, 2021 11:11 am

Features

  • Equipped with precise temperature probe, making the temperature difference within ±2ºF to provide ideal living environment for your aquariums
  • Safe and easy to use external controller help operate without getting hands wet, allow Celsius and Fahrenheit control from 68℉/20°C to 94℉/34°C
  • Automatically shut off will be activated if heater is no longer properly submerged, preventing damage
  • Ideal for freshwater and saltwater aquariums, aquaculture, glass containers, and hydroponic systems
  • 150 watts heater is designed for 30-40 gallon fish tanks

Rheem PROG40-38U RH62 EC1 Professional Classic Ultra Low NOx 40 Gallon Natural Gas Water Heater

$602.05  in stock
1 new from $602.05
Buy Now
Amazon.com
as of February 12, 2021 11:11 am

Features

  • Ultra Low NOx Gas Water Heaters are SCAQMD Rule 1121 Compliant
  • Temperature and Pressure Relief Valve Included
  • Maintenance Free – No Filter to Clean
  • High Altitude Compliant – Certified Up to 10,000 ft Above Sea Level
  • 6-Year Limited Tank and Parts Warranty

We believe that we helped you choose the most suitable 40 gallon water heater for yourself. If we didn’t succeded to help you with choosing the best 40 gallon water heater for you feel free to contact us.