Top 5 Best 40 Gallon Gas Water Heater: Editor Recommended

The 10 Best 40 Gallon Gas Water Heater Reviews:

1. Bradford White 40 Gallon Natural Gas Water Heater

Bradford White 40 Gallon Natural Gas Water Heater

The Atmospheric Vent FVIR Defender Safety System Models Feature: ■ Bradford White ICON System—Intelligent gas control with proven millivolt powered technology and built-in piezo igniter. A standard, off the shelf thermopile converts heat energy from the pilot flame into electrical energy to operate the gas valve and microprocessor.

No need for external electricity. — Enhanced Performance—Proprietary algorithms provide enhanced First Hour Delivery ratings and tighter temperature differentials. — Advanced Temperature Control System—Microprocessor constantly monitors and controls burner operation to maintain consistent and accurate water temperature levels.

Intelligent Diagnostics—An exclusive green LED light prompts the installer during start-up and provides ten different diagnostic codes to assist in troubleshooting. — Pilot On Indication—Flashing green LED provides positive indication that pilot is on. — Separate Immersed Thermowell—High-strength advanced polymer composite thermowell provides isolation between electric temperature sensor and surrounding water.

Highlighted Features:

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

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2. EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts

EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts

ECO 11 can be used for multiple or single applications depending on your climate. ECO 11 can provide hot water for one shower in colder climates, or two showers in warmer climates. Temperature range of 80-140°F (add in C)

This Smart Technology electric tankless water heater is configured for climates where incoming water temperature is 67 Degree F and above. This model is well suited for heating up to 2-Gallon per minute, which is the equivalent of one shower head (with a 1.5 gpm flow) and one sink with a low inlet water temperature of 67 Degree F.

Digital Temperature Control allows you to set your temperature in increments of 1 Degree. This model can also be used in colder climates as a Point of Use for a sink or other low flow application. Prior to purchase and installation please verify this model is the rights size for your hot water needs and electrical requirements.

Highlighted Features:

  • Endless On-Demand Hot Water; Consistent hot water when you need it that never runs out; Continuously monitored water temperature and controlled flow rates ensure efficiency and consistent performance within 1 degree of selected temperature
  • Save Space; EcoSmart tankless electric water heaters are 90% smaller than traditional tank heaters; may be installed on wall or at point of use; Dimensions 11.5 x 8 x 3.75 inches
  • Save Energy; EcoSmart tankless electric water heaters are 99% thermal energy efficient; Only heats water when called unlike a tank heater that maintains water temperature even when not being used.
  • EcoSmart ECO 11 Sizing; 13-kilowatt tankless electric water heater ideal for providing hot water for a bathroom, small sink, office breakroom and other point-of-use or low-flow applications; provides between 1.3 and 3.1 gallons-per-minute depending on the inlet water temperature; refer to the sizing guide to select the proper solution

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3. Natural Gas Tankless Water Heater On Demand Hot Water Heater Indoor

Natural Gas Tankless Water Heater On Demand Hot Water Heater Indoor

CSA certified in the United states and Canada. The tankless natural gas water heater features multi safety protections: Overheat protection, Flame Failure Protection, Low Water Flow Protection, High Water Pressure Protection, Dry combustion Production and Anti-freeze Protection.

Compact design, the Fogatti tankless water heater is only the size of a small suitcase, and the wall-mount design frees up valuable floor space within your home. The burner is manufactured using the latest European technology, high efficiency and energy saving. And the Heat Exchanger is made of oxygen-free copper, highly efficient and durable, it heats water only when you need it and saves on energy costs from day one.

Highlighted Features:

  • On Demand Hot Water: The tankless natural gas water heater heats water instantly with 170,000 BTU, enjoy a comfortable shower without waiting, save your valuable time, energy and water. The capacity is up to 4.2 GPM @ 67℉ Temperature Rise(Equivalent to 6.2 GPM with a 45℉ temp Rise). Perfect for households of 3-4.
  • Continuous Hot Water: The Fogatti natural gas tankless hot water heater is able to meet all of your hot water needs. No longer do you need to choose between a comfy shower, dish wash and laundry. Gas tankless hot water heaters deliveries endless hot water and keeps everyone happy.
  • Easy To Install or replace: The Fogatti indoor tankless water heater uses standard 3/4″ NPT water fittings and 3″ Vent Pipe for convenient and quick installation. Also compatible with standard gas pipes making it easier to replace a traditional tank. Plus, advanced venting technology enables more location options: Kitchen, Garage, Basement, Attic and etc.

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4. Rinnai Outdoor Tankless Hot Water Heater

Rinnai Outdoor Tankless Hot Water Heater

Rinnai’s high-efficiency outdoor tankless water heater models offer the most advanced technology with comfort and value. Unlike tank heaters which accumulate rusty sediments, this V94EN compact tankless water heater has a longer lifespan since water is heated on demand only which saves on energy costs. Rinnai products provide peace of mind with warranties that surpass the competition.

Highlighted Features:

  • Professional Installation Recommended, call 833-746-6212 for assistance. Endless hot water for your entire home
  • V94eN HE High Efficiency Tankless Hot Water Heater – Natural Gas: Outdoor Installation Only
  • Up to 9.4 GPM hot water flow rate (varies by groundwater temp)
  • Control-R 2.0 mobile app features timers and schedules throughout the day and allows you to remotely put the system into vacation mode
  • Residential Factory Warranty – 120 months (heat exchanger), 12 months (labor), 60 months (parts)

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5. Tankless Water Heater Natural Gas

Tankless Water Heater Natural Gas

Outdoor life always gives people enthusiasm and happiness and CAMPLUX outdoor has that figured out. CAMPLUX dedicated to providing you an easy and efficient outdoor life style. Portability, energy saving and innovation are the three key elements of CAMPLUX products. CAMPLUX range is constantly expanding so keen an eye out for quality, innovative products.

Camplux CA318 tankless water heater is great for whole house use,3.18 gallons per minute of on-demand endless hot water ensures constant comfortable instant hot water for 2-3 persons whole house. Minimum activation water capacity rate: 0.65 GPM-4.8 GPM; Maximum input rating: 82,000 BTUs; Water connection location/size: Bottom/0.5-inch NPT.

The tankless gas water heater uses standard 1/2″ NPT water fittings and comes with 2.3 inch horizontal venting pipe allowing for convenient and quick installation, great for whole home, small cabins and remote apartments use. You can take Camplux customized wall thimble-WT236 for perfect indoor use ,you can buy the bundle to save money.

Trendy and modern design with unique black glassy front paneleasy to control the water temperature with LED touchscreen (Fahrenheit and Celsius switch optional).The compact size tankless gas water heater saves more space than traditional tanks.

The tankless hot water heater comes with oxgen-free copper heat exchanger and stainless steel enhanced burner, high heating efficiency up to 89.98 %; 90°wind isolation design, this gas on demand water heater can anti backflow wind in high floors, the S/S 2.36 ” vent pipe exhaust harmful gases quickly.

Highlighted Features:

  • Camplux 3.18 GPM tankless water heater natural gas delivers 3.18 gallons per minute of on-demand endless hot water ensures constant comfortable instant hot water for 2-3 persons whole house. 3.18-GPM heater is activated by water flow rather than water pressure; Minimum activation water capacity rate: 0.65 GPM-4.8 GPM; Maximum input rating: 82,000 BTUs; Water connection location/size: Bottom/0.5-inch NPT.
  • The tankless water heater uses standard 1/2″ BSP water fitting and gas inlet. The water heater comes with1/2 ” BSP female to 1/2″ NPT male gas connector adapter then you want hook this water heater to natural gas pipe directly. It also comes with 2.3″ horizontal vent pipe, ensures efficient power ventilation. You can take Camplux customized wall thimble-WT236 for perfect indoor use.
  • Modern Design, Easy Operation -Trendy and modern design with unique black glassy front panel easy to control the water temperature with LED touchscreen (Fahrenheit and Celsius switch optional).The compact size instant water heater saves more space than traditional tanks.
  • The Camplux tankless hot water heater comes with oxgen-free copper heat exchanger and v-type stainless steel burner, high heating efficiency up to 89.98 %; 90°wind isolation design, this tankless natural gas water heater can anti backflow wind in high floors, the S/S 2.36 ” vent pipe exhaust harmful gases quickly.
  • Dry combustion, flame failure device, anti-freezing protection, over heating protection to ensure your safety. Fully automatic temperature controls with an energy saving mode and child lock technology.

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6. ecosmart ECO 18 Electric Tankless Water Heater, 18 KW at 240 Volts

ECO 18 Electric Tankless Water Heater

This Smart Technology electric tankless water heater is configured for climates where incoming water temperature is 62 Degree F and above. The ECO 18 is capable of heating over 2.5-Gallon per minute, which is the equivalent of one shower head (with a 1.5 gpm flow) and one sink with a low inlet water temperature of 62 Degree F.

Two showers can be run simultaneously when incoming water temperature is above 70 Degree F in warmer climates such as South Texas, South Florida, New Mexico, Arizona and South California. These models come with a digital temperature control that allows you to set your temperature in increments of 1 Degree. Prior to purchase and installation please verify this model is the rights size for your hot water needs and electrical requirements.

Highlighted Features:

  • The product is highly durable
  • The product is easy to use
  • Manufactured in China
  • Amperage (amps): 75. Activation flow: 0. 3 GPM. Flow Rate @ 35 F Rise (gallons/min): 3. 51 gal (US)/min
  • The product works and is compatible with 2 X 40 AMP (DP) breakers and 2 X 8 AWG wire
  • Lifetime warranty for residential use
  • Save up to 60% on your water heating costs with the most advanced, self modulating technology available

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7. Noritz NRC66DVNG Indoor Condensing Direct Tankless Hot Water Heater

Noritz NRC66DVNG Indoor Condensing Direct Tankless Hot Water Heater

The NORITZ NRC66DV is a fully condensing tankless water heater with an advanced heat exchanger design and built-in controller. With flow rates up to 6.5 gallons per minute the NRC66DV delivers the highest flow rates in its category and can be vented using 3″ Schedule 40/80 PVC, PP or CPVC.

Various adapters and terminations are available to allow for a wide array of venting options.  This unit ships complete with a 6′ power cord.  IK-WV-200-1-XX-LF valve kit (required for installation) is sold separately. Common companion items include rain cap (PRC-1), atmospheric conversion kit (SVCK-3) and horizontal termination/intake PVT-HL.

Highlighted Features:

  • Endless hot water
  • Can be vented with Schedule 40 PVC Pipe and Fitting
  • High Efficiency
  • Low Nox
  • Remote thermostat & 6′ power cord included

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8. Takagi T-H3J-DV-N Condensing High Efficiency Natural Gas

Takagi T-H3J-DV-N Condensing High Efficiency Natural Gas

With gas inputs of 160,000 BTU, the T-H3J can produce enough hot water for two bathrooms in warmer climates or 1.5 baths in colder climates. With gas inputs of 160,000 BTU, the T-H3J can produce enough hot water for two bathrooms in warmer climates or 1.5 baths in colder climates.

Highlighted Features:

  • Endless hot water, On-demand usage, Compact, Space saving, Energy conservation
  • Computerized safety features, No pilot light to have to worry about
  • Satisfies the 2012 SCAQMD Rule 1146.2 for Ultra-Low NOx Emissions

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9. Rinnai Indoor Tankless Hot Water Heater

Rinnai Indoor Tankless Hot Water Heater

Rinnai’s super high-efficiency plus condensing indoor tankless water heater models offer the most advanced technology with SENSEI. Unlike tank heaters which accumulate rusty sediments, this RU180in compact tankless water heater has a longer lifespan since water runs continuously through pipes. Pair with an external pump and enjoy on-demand recirculation technology for faster and more efficient hot water delivery right out of the faucet!

Highlighted 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: Up to 10 GPM hot water flow rate for a powerful, constant stream
  • Instant Heating: Equipped with Circ-Logic – Pair with an external pump to reduce wait time for hot water via scheduled or on-demand recirculation
  • Guaranteed to Last: 15-, 5-, and 1-year residential for heat exchanger, labor, and parts, respectively. Wifi monitoring.

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10. RELIANCE WATER HEATER gallon Electric Water Heater

RELIANCE WATER HEATER gallon Electric Water Heater

40 gallon, electric, medium, dual 5500W, 240V elements, 3″ insulation, 95 energy factor, recovery at a 90 degrees rise-gallons/hours 25, first hour rating 56, t & p valve, pex polymer lined heat trap nipples, pex dip tube, glass lined tank, duel mag anode rod, unit dimensions: 22″d x 50″h, 12 year tank & parts warranty, meets new naeca 2015 efficiency standards.

Highlighted Features:

  • Pex polymer lined heat trap nipples
  • Aluminum anode rod
  • 95 energy factor
  • Model number: 6-30-EOLBS 100

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