Best Gas Water Heater 40 Gallon -Selected Reviews

Have you ever wanted to buy a gas water heater 40 gallon? You need to consider several factors before buying gas water heater 40 gallon. Several options have good features, and the price is not that high. You must read different gas water heater 40 gallon reviews to compare and choose the best. We share this information in our review based on the market feedback and our expert team's research.

When considering the different kinds of gas water heater 40 gallon available, I decided to set up this website to explore a wide range of them. Hopefully, you will find my reviews helpful when deciding which gas water heater 40 gallon to buy. Trying to pick a multi-purpose gas water heater 40 gallon from among the crowd of businesses trying to compare each other with various features.

How we Choose

To identify the best gas water heater 40 gallon, we looked at key areas: quality, materials and durability, and ease of use. Analyzing gas water heater 40 gallon often for hours at a time. We looked at whether gas water heater 40 gallon could easily use. We compared them side by side and evaluated them on a range to determine which one was the best. Our expert's recommendations determined our top picks based on the following criteria:

  • Brand
  • Quality
  • Price
  • Types
  • Materials
  • Ease of Use
  • Function
  • Durability
  • Longevity
  • Warranty
  • Return Policy

Top gas water heater 40 gallon Compared

# Preview Product
1 Bradford White 40 Gallon Natural Gas Water Heater #RG240T6N

Bradford White 40 Gallon Natural Gas Water Heater #RG240T6N

2 Bosch Thermotechnology 40-Gallon Tall Electric Storage Water Heater, Gray

Bosch Thermotechnology 40-Gallon Tall Electric Storage Water Heater, Gray

3 A.O. Smith ENS-40 ProMax Short Electric Water Heater, 40 gal

A.O. Smith ENS-40 ProMax Short Electric Water Heater, 40 gal

4 Reliance 6-40-NOCT 400 35500 BTU Tall Natural Gas Water Heater, 40 gallon

Reliance 6-40-NOCT 400 35500 BTU Tall Natural Gas Water Heater, 40 gallon

5 EZ Ultra HE Natural Gas Indoor Condensing Tankless Water Heater - Digital Display - Whole Home - FREE SHIPPING

EZ Ultra HE Natural Gas Indoor Condensing Tankless Water Heater - Digital Display - Whole Home -...

6 Camplux Tankless Water Heater, 2.64 GPM On Demand Instant Hot Water Heater,Propane Tankless Water Heater for Shower, White

Camplux Tankless Water Heater, 2.64 GPM On Demand Instant Hot Water Heater,Propane Tankless Water...

7 EZ Ultra HE Propane (LPG) Gas Indoor Condensing Tankless Water Heater - Digital Display - Whole Home - FREE SHIPPING

EZ Ultra HE Propane (LPG) Gas Indoor Condensing Tankless Water Heater - Digital Display - Whole Home...

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

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

9 Eccotemp i12-LP Water Heater, 4 GPM, Black

Eccotemp i12-LP Water Heater, 4 GPM, Black

10 Tankless Water Heater, 3.17 GPM Instant Hot Natural Gas Water Heater with Constant Temperature, Indoor (Natural Gas)

Tankless Water Heater, 3.17 GPM Instant Hot Natural Gas Water Heater with Constant Temperature,...

11 Natural Gas Tankless Water Heater, FOGATTI Outdoor 8.1 GPM, 180000 BTU White Instant Hot Water Heater

Natural Gas Tankless Water Heater, FOGATTI Outdoor 8.1 GPM, 180000 BTU White Instant Hot Water...

12 Natural Gas Tankless Water Heater, FOGATTI Indoor 7.5 GPM, 170000 BTU White Instant Hot Water Heater

Natural Gas Tankless Water Heater, FOGATTI Indoor 7.5 GPM, 170000 BTU White Instant Hot Water Heater

13 ecosmart ECO 18 Electric Tankless Water Heater, 18 KW at 240 Volts with Patented Self Modulating Technology,White 17 x 14 x 3.5

ecosmart ECO 18 Electric Tankless Water Heater, 18 KW at 240 Volts with Patented Self Modulating...

14 Tankless Water Heater Natural Gas, Camplux High Efficiency Natural Gas Tankless Water Heater with Fahrenheit Digital Display, 3.18 GPM On Demand Water Heater for 2-3 Persons Bathroom Indoor Use,White

Tankless Water Heater Natural Gas, Camplux High Efficiency Natural Gas Tankless Water Heater with...

15 Rinnai V94eN Natural Gas Tankless Hot Water Heater, 9.8 GPM

Rinnai V94eN Natural Gas Tankless Hot Water Heater, 9.8 GPM

16 Rinnai V65eN Natural Gas Tankless Hot Water Heater, 6.5 GPM

Rinnai V65eN Natural Gas Tankless Hot Water Heater, 6.5 GPM

17 Rinnai V65eP Propane Tankless Hot Water Heater, 6.5 GPM

Rinnai V65eP Propane Tankless Hot Water Heater, 6.5 GPM

18 Airthereal Electric Tankless Water Heater, 9kW, 240Volts - Endless On-Demand Hot Water - Self Modulates to Save Energy Use - for Sink and Faucet, Evening Tide series

Airthereal Electric Tankless Water Heater, 9kW, 240Volts - Endless On-Demand Hot Water - Self...

19 Rinnai Indoor Tankless Hot Water Heater / V65iN / Natural Gas / 6.3 GPM

Rinnai Indoor Tankless Hot Water Heater / V65iN / Natural Gas / 6.3 GPM

20 Stiebel Eltron MegaBoost Tank Booster Water Heater

Stiebel Eltron MegaBoost Tank Booster Water Heater

List of Best gas water heater 40 gallon: Top 20 Reviews

Bestseller No. 1

Bradford White 40 Gallon Natural Gas Water Heater #RG240T6N

  • Bradford White ICON System
  • Advanced ScreenLok Technology Flame Arrestor Design
  • Resettable Thermal Switch
  • Maintenance-Fre
  • Factory-Installed Hydrojet Total Performance System
Bestseller No. 2

Bosch Thermotechnology 40-Gallon Tall Electric Storage Water Heater, Gray

  • APPLICATION: Dimensions : 18.25" W x 61.60" H x 18.25" L. Perfect size for a maintenance closet, access closet under the stairs, crawl space. Ideal for replacement projects.
  • DURABILITY: Two magnesium anode rods for extra tank protection. Dielectric heat trap. Heavy gauges steel tank for extra years of trouble-free service. Glass-lined steel tank to help prevent corrosion.
  • WARRANTY: 10-year tank and parts limited warranty
  • EFFICIENCY: HFO foam insulated, reducing fuel costs and increasing energy efficiency. Double heating elements conserve energy. Incoloy elements for a long-lasting unit
  • CONVENIENCE: Factory-installed electric hot and cold water connections for extended tank life. Easy-to-use plastic drain valve for maintenance. Factory-installed heat traps reduce heat loss. Temperature and pressure relief valve included. Fully-automatic surface mount thermostats
Bestseller No. 3

A.O. Smith ENS-40 ProMax Short Electric Water Heater, 40 gal

  • Permaglas glass coating protects steel tank from corrosion and maximizes tank life
  • Dynaclean diffuser dip tube helps reduce lime and sediment buildup while maximizing hot water output; made from long-lasting PEX cross-linked polymer
  • CoreGard anode rode aluminum anode with stainless steel core protects tank against corrosion longer than ordinary steel anodes
  • Durable, tamper-resistant brass drain valve
  • Meets all current regulations set forth by the National Appliance Energy Conservation Act (NAECA)
Bestseller No. 4

Reliance 6-40-NOCT 400 35500 BTU Tall Natural Gas Water Heater, 40 gallon

  • Pex polymer lined heat trap nipples
  • Aluminum anode rod
  • For installations up to 10
Bestseller No. 5

EZ Ultra HE Natural Gas Indoor Condensing Tankless Water Heater - Digital Display - Whole Home - FREE SHIPPING

  • Condensing Technology - The EZ Ultra HE uses exhaust gas to preheat incoming water for added efficiency.
  • This heater can be vented horizontally or vertically using 2" Solid Core Schedule 40 PVC/CPVC
  • Back-draft prevention device and stainless steel horizontal vent pipe are included.
  • Capacity Up to 3.4 GPM @ 45F Rise In Ambient Temperature
  • FREE SHIPPING
Bestseller No. 6

Camplux Tankless Water Heater, 2.64 GPM On Demand Instant Hot Water Heater,Propane Tankless Water Heater for Shower, White

  • 2.64 GPM Instant Hot Water -Camplux 2.64 GPM natural gas tankless water heater delivers 2.64 GPM on demand endless hot water ensures instant hot water for any small homes, cabins or apartments. On demand water heater only heats the water when you need it and no waiting for preheat.
  • 6-IN-1 Multiple Protection- Flame-out protection, anti-freezing protection (manual drainage needed), over-heating protection, air flow pressure switch protection to ensure the safety. Safe electronic ignition system, plugs into standard 120V electrical outlet with UL-listed cord.
  • Easy Installation -The tankless water heater uses standard 1/2" BSP water fitting and gas inlet. The water heater comes with 1/2 " 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" horizontal vent pipe,ensures efficient power ventilation. Minimum activation rate: 0.65 GPM; Maximum input rating: 68,000 BTU; Water connection location/size: Bottom/0.5-inch NPT.
  • Compact Design,Energy saving -The compact size instant hot water heater saves more space than traditional tanks.Trendy and modern design with fahrenheit digital temperature display. Eco and Full gas switch for energy saving and get ideal hot water temperature.
  • Considerate Customer Service- Here at Camplux, customer service is everything ! We offer 24 shift hours customer service make the customer experience easy and fast through our live chat, phone support & our online helpdesk. Have a question? Give us a call at (844) 538-7475.
Bestseller No. 7

EZ Ultra HE Propane (LPG) Gas Indoor Condensing Tankless Water Heater - Digital Display - Whole Home - FREE SHIPPING

  • Condensing Technology - The EZ Ultra HE uses exhaust gas to preheat incoming water for added efficiency.
  • This heater can be vented horizontally or vertically using 2" Solid Core Schedule 40 PVC/CPVC
  • Back-draft prevention device and stainless steel horizontal vent pipe are included.
  • Capacity Up to 3.4 GPM @ 45F Rise In Ambient Temperature
  • FREE SHIPPING
SaleBestseller No. 8

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

  • Wattage: 13000.0
SaleBestseller No. 9

Eccotemp i12-LP Water Heater, 4 GPM, Black

  • Whole home indoor, gas powered tankless water heater, rated at 4 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
  • Uses standard 1/2" NPT water fittings and comes with horizontal venting allowing for a convenient and quick installation
SaleBestseller No. 10

Tankless Water Heater, 3.17 GPM Instant Hot Natural Gas Water Heater with Constant Temperature, Indoor (Natural Gas)

  • Note: Please download and read the installation manual and product manual carefully when purchasing the product to ensure that your installation environment is consistent with this product. When installing, please strictly follow the installation manual and installation instruction video, otherwise it may not work. If you have any questions about the product, please contact us by email. We have a professional technical support team.
  • 【Tankless Instant Hot Water Heater】No need to preheat before using the tankless water heater. As soon as you turn on the tap, the water flows with your desired temperature.
  • 【High Sensitive Touch Led Display】Comes with smart digital LED display high-definition large screen, freely adjustable the temperature between 30℃-65℃.
  • 【Multiple Security Protection】The natural gas water heater is upgraded with 12 protection methods to ensure your safety. Such as dry burning protection, over 65℃(149 °F) protection, leakage protection, etc.
  • 【Energy and Money Saving】The hot water heater adjusts power input based on flow rate and temp setting in real time. Summer/winter 2 modes to save up to 60% on your natural gas costs.
Bestseller No. 11

Natural Gas Tankless Water Heater, FOGATTI Outdoor 8.1 GPM, 180000 BTU White Instant Hot Water Heater

  • We recommend that all installations of units must be done in accordance with the local building and plumbing codes of the installation location and installation be done by a licensed professional.
  • The tankless design means you don't have to wait 30 minutes for preheating and unlimited use of hot water.
  • 180,000 BTU high heating capacity and maximum 8.1 GPM. It is suitable for 3-5 outlet points, which can satisfy whole family. UEF over 0.82, the high energy conversion rate can effectively reduce energy loss.
  • Excellent quality CSA certified in the United States and Canada. Adopting the world's most advanced technology, superior safety and durability.
  • Using built in forced exhaust fan at the bottom ensures stable combustion and eliminates the influence of external wind. Compact design for easy installation.
SaleBestseller No. 12

Natural Gas Tankless Water Heater, FOGATTI Indoor 7.5 GPM, 170000 BTU White Instant Hot Water Heater

  • We recommend that all installations of units must be done in accordance with the local building and plumbing codes of the installation location and installation be done by a licensed professional.
  • The tankless design means you don't have to wait 30 minutes for preheating and unlimited use of hot water.
  • 170,000 BTU high heating capacity and maximum 7.5 GPM. It is suitable for 3-4 outlet points, which can satisfy whole family. UEF over 0.82, the high energy conversion rate can effectively reduce energy loss.
  • Excellent quality CSA certified in the United States and Canada. Adopting the world's most advanced technology, superior safety and durability.
  • Using built in forced exhaust fan at the bottom ensures stable combustion and eliminates the influence of external wind. Compact design for easy installation.
SaleBestseller No. 13

ecosmart ECO 18 Electric Tankless Water Heater, 18 KW at 240 Volts with Patented Self Modulating Technology,White 17 x 14 x 3.5

  • 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
Bestseller No. 14

Tankless Water Heater Natural Gas, Camplux High Efficiency Natural Gas Tankless Water Heater with Fahrenheit Digital Display, 3.18 GPM On Demand Water Heater for 2-3 Persons Bathroom Indoor Use,White

  • 3.18 GPM Instant Constant Water Heater -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.
  • Convenient, Easy Installation -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 white glassy front panel,easy to control the water temperature with LED touchscreen (Fahrenheit and Celsius switch optional).The compact size on demand water heater saves more space than traditional tanks.
  • Outstanding Features- The Camplux tankless gas 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.
  • 6-In-1 Protection Ensure Your Safety- 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.
Bestseller No. 15

Rinnai V94eN Natural Gas Tankless Hot Water Heater, 9.8 GPM

  • 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: High-performance up to 9.8 GPM hot water flow rate for a powerful, constant stream
  • Enhanced scale detection lessens possibility of serious, long-term damage to unit
  • Guaranteed to Last: 10-, 5-, and 1-year residential factory warranty for heat exchanger, labor, and parts, respectively
SaleBestseller No. 16

Rinnai V65eN Natural Gas Tankless Hot Water Heater, 6.5 GPM

  • 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: High-performance up to 6.5 GPM hot water flow rate for a powerful, constant stream
  • Enhanced scale detection lessens possibility of serious, long-term damage to unit
  • Guaranteed to Last: 10-, 5-, and 1-year residential factory warranty for heat exchanger, labor, and parts, respectively
SaleBestseller No. 17

Rinnai V65eP Propane Tankless Hot Water Heater, 6.5 GPM

  • 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: High-performance up to 6.5 GPM hot water flow rate for a powerful, constant stream
  • Enhanced scale detection lessens possibility of serious, long-term damage to unit
  • Guaranteed to Last: 10-, 5-, and 1-year residential factory warranty for heat exchanger, labor, and parts, respectively
Bestseller No. 18

Airthereal Electric Tankless Water Heater, 9kW, 240Volts - Endless On-Demand Hot Water - Self Modulates to Save Energy Use - for Sink and Faucet, Evening Tide series

  • ☼ Endless Hot Water: Imagine you are the last one in your family to take a shower before heading out for the day. You turn on the faucet and the water is freezing cold. Too bad you don’t have an Airthereal Electric Tankless Water to provide endless hot water on demand with no preheating, temperature fluctuations, or running out of hot water in the tank.
  • ☼ Save Space: That water heater in the basement or utility closet takes up a ton of space. This wall-mounted water heater uses 90% less space than a traditional hot water heater with a tank.
  • ☼ Save Energy: Water is only heated when you need it, not stored in a hot water tank. The self-modulating temperature technology only uses energy to heat up water while you are using it to save up to 50% on water heating costs compared to a typical tank water heater.
  • ☼ Important Note: In order to install 9kW Electric Tankless Water Heater it would requires 240 Voltage, 40 AMP Circuit Breaker Size. Please check to confirm that your breaker panel meet these specifications.
  • ☼ Safe To Use: With high temp protection, dry heating protection, and electrical leakage protection you can rest easily knowing you have safe, on-demand hot water to use on your schedule. The electric and fluid systems are completely separated to prevent electric leakage and water pipe corrosion.
Bestseller No. 19

Rinnai Indoor Tankless Hot Water Heater / V65iN / Natural Gas / 6.3 GPM

  • 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: High-performance up to 6.5 GPM hot water flow rate for a powerful, constant stream
  • Enhanced scale detection lessens possibility of serious, long-term damage to unit
  • Guaranteed to Last: 10-, 5-, and 1-year residential factory warranty for heat exchanger, labor, and parts, respectively
Bestseller No. 20

Stiebel Eltron MegaBoost Tank Booster Water Heater

  • More hot water for more Showers or longer Showers
  • Saves space by making a small tank perform like a large tank
  • Fast & accurate hot water temperature adjustment for convenience and comfort
  • Increases existing tank capacity up to 70%
  • 200% faster recovery time

Buyer's Guide: Everything You Need to Know about gas water heater 40 gallon

gas water heater 40 gallon are available in various sizes and styles, so you can choose the one that best fits your needs. While most gas water heater 40 gallon is fairly simple to use, there are a few things you should know before use. First, you'll need to decide what size gas water heater 40 gallon you need. gas water heater 40 gallon come in various sizes, from compact models for small apartments to full-sized models. Once you've decided on the right size, you'll need to choose a model with the desired features. You can check out Amazon for some of the exclusive selections of gas water heater 40 gallon available at great prices.

These questions will help narrow down your search. If there were one thing we could tell everyone about buying any product, it would be patience.

  • What is the best gas water heater 40 gallon for your needs?
  • How to find a reputable seller when buying the best gas water heater 40 gallon?
  • When to buy gas water heater 40 gallon?
  • Where to buy gas water heater 40 gallon from?

1. Budget

To reduce the risk of picking a sub-standard product, you should consider purchasing gas water heater 40 gallon that are both inexpensive. That way, if your choice wasn't right for any reason, it won't be as much of a blow. If you have a limited budget and still want to use good quality items, choose an inexpensive product made by a well-known brand. The company understands budgetary limits involved, too – they've put their heart into developing their products to meet those limits even though they may not have had to worry about them previously.

As long as you use the best item with care and don't abuse it by taking advantage of its cheaper materials, it should last you a long time, and if not, the company will honor the 1-year warranty. For those who like to change their home or office walls as often as they change their minds, the inexpensive best gas water heater 40 gallon is perfect; it makes various changes over time. However, ensure you don't purchase anything too cheap as these products are not very durable and won't last long.

2. Only for yourself, or is it for others

The best gas water heater 40 gallon is the one we can use for ourselves and others. We must be mindful of our own needs and consider how other people might feel in this situation. Suppose they have more money than us or fewer resources available to them. In that case, it makes sense that you would want their lives positively impacted by paying forward what little wealth may exist between yourselves because there's no such thing as too much when trying to help. Someone else succeeds!

3. Do you have enough money?

It can be a sensitive topic for some people to talk about the issue of money. Some may have too much, while others struggle to make ends meet and buy what they need to achieve their lives potential. Before you spend your hard-earned cash on something that will help improve our quality of life as consumers, consider if it's worth spending those funds with this purchase by considering how often we should upgrade or get new items.

4. Price and quality

In addition to looking at the best item's features and how it might help you, consider its price. Sometimes a more expensive product isn't always better because it may have less value than a lower-priced item that fits your needs. Buying the best gas water heater 40 gallon is worth it when you want a long-lasting, high-quality item that will last for many years. Cheaper products can have worse materials or design defects which would cost more in repairs down the line!

If you need a high-quality product that is powerful within its design limits, use a list price to verify the purchase price to ensure you get the best gas water heater 40 gallon under ~$200-$300 while everything is on sale.

5. Importance of the gas water heater 40 gallon

The best gas water heater 40 gallon  to purchase is quality, followed by cost. Good-looking products are not always necessary for the everyday use of any product. Consumers care about how something looks before they buy it because this might show that the company spent money on making their product look good instead of just worrying about its function or price point. If you don't have enough money to purchase quality and cost, try researching which would suit your needs more than others and invest in that first.

One thing worth mentioning is people will always pay more for something where you get what you paid for, so if there is a point where you can get both, then go for it, but if you can't get either, then focus on quality first.

Leave a Comment