Top 10 Best Gas Water Heater 40 Gallon Reviews In 2023

Are you searching for the best gas water heater 40 gallon? Confused with too many options? If that is your situation, you have come to the right place. This is your ultimate guide to buying the gas water heater 40 gallon.

We understand how much of a hassle it can be to go through thousands of reviews when you have too many options. So, leave all your worries, check out this ultimate guide, and make a hassle-free purchase decision.

10 Best gas water heater 40 gallon Reviews in 2023

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

Features :

  • Pex polymer lined heat trap nipples
  • Aluminum anode rod
  • For installations up to 10

Additional Info :

Color No Color
Item Dimensions
Height 61.81
Width 21.13
Length 1
Weight 150

2. TCFUNDY 16L Tankless Water Heater Natural Gas, 4.23 GPM On-Demand Instant Hot Water Heater, Indoor Whole House Gas Water Heater, Digital Display & Touch Screen, Thermostatic & Energy Saving

Features :

  • 【16L Tankless Water Heater】TCFUNDY Tankless water heater with compact design saves more space and energy efficient than traditional water heaters. LCE screen with digital temperature display and touch screen control. There are 3 modes you can choose: eco mode, common mode, tub mode.
  • 【On-Demand Instant Water Heater】High efficiency natural Gas tankless water heater delivers 4.23 gallons per minute of on-demand endless hot water. No more waiting for long time, instant hot water for families, homes, cabins or apartments.
  • 【Thermostatic & Energy Saving】Water heater built-in high-precision thermostat ensures constant temperature, high-thermal efficiency up to 90%. The self-modulating temperature technology only heat up water while you are using it to save energy.
  • 【Safety of Use】Premium Oxygen-Free Copper Heat Exchanger to ensure long lifespan, automatic power-off when water is off and over-temperature protection, flame-out protection, anti-freezing protection(manual drainage needed via water relief valve), air flow pressure switch protection to ensure the safety.
  • 【Easy Installation】Comes with 18.9“x2.36″ horizontal vent pipe to ensure efficient power ventilation, with showerhead. Minimum activation rate: 0.66 GPM. Min. water pressure: 2.9 PSI, low water pressure to start, users of higher floors can enjoy pleasant experience of shower.

Additional Info :

Color Gold
Item Dimensions
Height 22.05
Width 6.3
Length 14.57

3. Bradford White 40 Gallon Natural Gas Water Heater #RG240T6N

Features :

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

Additional Info :

Color Green,White
Item Dimensions
Height 60.5
Width 20
Length 20
Weight 134

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

Features :

  • 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

Additional Info :

Color Gray
Item Dimensions
Height 61.6
Width 18.25
Length 18.25
Weight 103.7

5. Rheem Prestige High Efficiency 9.5GPM Indoor Natural Gas Tankless Water Heater

Features :

  • Hot water without the wait – or the waste
  • Low operating cost – High energy efficiency and water savings setting
  • Space Savings – Compact, space-saving design. Perfect for a tank replacement.
  • Water & Gas Leak Detection will shut down unit and provide an error code
  • For use indoor only

Additional Info :

Color Gray
Item Dimensions
Height 28.5
Width 9.75
Length 27.5
Weight 77

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

Features :

  • NOTE: This product does not have a serial number. If you don’t know how to install a water heater at all, it is recommended not to buy it.
  • 【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.NOTE: This product does not have a serial number. If you don’t know how to install a water heater at all, it is recommended not to buy it.
  • 【High Sensitive Touch Led Display】Comes with smart digital LED display high-definition large screen, freely adjustable the temperature between 30℃-65℃.NOTE: This product does not have a serial number. If you don’t know how to install a water heater at all, it is recommended not to buy it.
  • 【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.Note: In cold weather, if the water heater is not used for a long time, it is necessary to open the pressure relief valve to drain the residual water in the water heater to prevent the exchanger or water pipe from freezing and swelling.
  • 【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.NOTE: This product does not have a serial number. If you don’t know how to install a water heater at all, it is recommended not to buy it.
  • 【Quality Material】Made with brushed stainless steel material, the natural gas water heater has the function of high temperature resistance, corrosion resistance. Built-in oxygen-free copper water tank, long service time.Note: This product must be installed with a ventilation and smoke exhaust pipe for normal use.NOTE: This product does not have a serial number. If you don’t know how to install a water heater at all, it is recommended not to buy it.
  • 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.

Additional Info :

Item Dimensions
Height 5
Width 14
Length 21

7. State Proline Atmospheric Vent Series 40 Gallon Capacity 40,000 BTU Heating Input Short Gas Water Heater

Features :

  • 67 Gallons per Hour First Hour Rating
  • 0.58 Uniform Energy Factor Rating
  • 41 Gallons per Hour Recovery at 90°F Rise
  • Dimensions: 48″ H x 22″ D

Additional Info :

Color Silver
Item Dimensions
Height 48
Width 22
Length 22
Weight 135

8. Reflective Water Heater Jacket Insulation Fits 40 Gallon Tank R Value 6 (Tape)

Features :

  • >>>Fits Gas or Electric Units
  • >>>Increases R Value and efficiency of water heater
  • >>>Contains no Fiberglass
  • >>>Comes with plenty of military grade aluminum tape
  • >>>Come with Step by Step Instructions

Additional Info :

Color Multi

9. AO Smith 40 Gallon 40,000 BTU Water Heater

Features :

  • 40 gallon tank
  • 40,000 BTU
  • GCR-40 standard vent
  • 6 year limited tank warranty

Additional Info :

Color Gray

10. Eccotemp FVI12-LP Liquid Propane Gas Tankless Water Heaters, White

Features :

  • Whole home indoor, gas powered tankless water heater, rated at 3.6 GPM that activates only when in use, making it an energy saver.
  • For indoor installation with safe, efficient power ventilation and perfect for any small home, cabin or apartment.
  • Easy to read digital temperature display, on a compact and space-saving design with minimal noise output.
  • Safe electronic ignition system; plugs into standard 120v electrical outlet with UL-listed cord.
  • Uses standard 1/2″ NPT water fittings and is equipped with easy to use manual water temperature controls.Minimum 0.65 GPM flow rate

Additional Info :

Color White
Item Dimensions
Height 4
Width 14.5
Length 25
Weight 0.000625

Factors You Should Consider Before Buying the gas water heater 40 gallon

As you already know, research is essential before making any purchase. So, there are some factors you should consider before starting your research. This is important so that you can make your entire buying process as hassle-free as possible.

Remember, your time has as much value as your money. So, there are a few things you should determine which will affect your research as well.

There are a few questions you should ask yourself to determine your course of research on the gas water heater 40 gallon:

  • Is this gas water heater 40 gallon serving the purpose of purchase? What are your expectations from the product?
  • What functions must the gas water heater 40 gallon have? Are there any specific functions that you are seeking in the product?
  • Is there a specific budget, or is the budget flexible?
  • Will the gas water heater 40 gallon require maintenance and upkeep costs?
  • Are you looking to buy the gas water heater 40 gallon online or offline? What will be the best places to purchase the product?
  • Where will you seek reliable information on the gas water heater 40 gallon?

Having multiple options from various brands can get confusing, so ask yourself these questions to narrow down your research.

Once you determine your expectations from the gas water heater 40 gallon and your price range, you decide which ones you must research. The research will help you determine the pros and cons. But before that, where will you get the reliable information to conduct your research?

Sources for Research

It’s 2023, and your best sources for information and research can be found online. Google gas water heater 40 gallon and you will find the best selling online marketplaces available. Visit any or each of them to learn about the specifications and prices given on your gas water heater 40 gallon.

You will be able to find the best deals out of all the options. You can also watch some YouTube videos on the product to see for yourself the functionality of the gas water heater 40 gallon.

Advantages of Buying Products from Online Sites

Online sites provide a variety of benefits that make your selection and buying process easier. Here are some of the advantages of buying products from online sites:

Best Prices

Reliable online sites give you the benefit of comparing prices and finding the best deals. Platforms like work with manufacturers directly to provide better deals. And the coupons and occasional discounts add to it.

There are no intermediaries in between to make the buying process easy. And the best part? No trouble of going to the shop.


Renowned online sites like Newegg, Amazon, Walmart have branches all over the country. Their transaction and delivery policies are reliable compared to other e-commerce platforms.

Huge Selection

More Variety – the best part about online shopping platforms. These sites give you access to a vast variety of options to choose from.

Suppose you go to Search gas water heater 40 gallon and up comes options of the product in different prices, brands, and specs. You get to browse these options from the comfort of your home and save time.

You can choose the one that fits your need from your preferred seller. Yes, online platforms even give you the option to choose your seller.


These online sites have numerous customer reviews of the products shown. So, you know which product is authentic and which seller is authorized. And for these facilities provided, they are trustworthy and credible.

Other additional benefits of shopping from online sites would be the facility of easy return and record of the purchase. Online sites are constantly making changes to make shopping easy and hassle-free from the comfort of our homes.

How to Select the gas water heater 40 gallon

Making your final decision can pose to be a challenge. But worry not. We have a few suggestions to make your selection process easier.

Before that, we would recommend you opt for sites like Amazon, Walmart, Newegg, and Best Buy for your purchase.

So the factors you should consider while selecting your gas water heater 40 gallon would be:


Hop on to any of these sites and search the options you have shortlisted. Then compare the prices and look for discounts. Don’t forget to factor in shipping charges as well.

Once you get the best favorable deal, you can opt for the gas water heater 40 gallonto match your need.


Price and brand are somewhat interrelated. Usually, high-end brands charge more. But higher price does not mean a better choice.

So, opt for the brand that meets your need the best.


Factor in the functionality of the product as it is very crucial. Check if the specs meet your need. Consider buying the one that will last in the longer run.

Understand the gas water heater 40 gallon specs and functionality to determine its use for you.

Customer Reviews

As we mentioned before, online sites usually have a review section. This section is filled with customer feedbacks and even pictures of the product.

Browsing through these reviews is the smartest thing to do. These reviews allow you to comprehend how the product will work for you. You can even determine the pros and cons of these reviews.

Check the rating on the website to learn if the seller is delivering the gas water heater 40 gallon as expected by the other buyers.

Final Words

All these factors will contribute to choosing your best gas water heater 40 gallon that meets your expectations. So, use your time efficiently.

And that is all for the ultimate guide to buying the gas water heater 40 gallon. We hope you can make your purchase confidently. Happy Shopping!

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