Best 40 Gallon Gas Water Heaters of 2020 – Ultimate Review

| Last Updated: April 16, 2021

Was your day hectic and a cold shower is just going to add to your misery? Well, it’s no longer an issue! With a 40-gallon gas water heater in your home, you can have sufficient space to store hot water. These gas water heaters will provide you with a lot of hot water every time without any hindrance.

Now you don’t need to wait for a long period to get hot water. You can use these heaters easily for taking a soothing and relaxing steam bath.

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However, there are a lot of gas water heaters available in the market. To help you pick the best one, we will be discussing the best ones.

Comparison Chart of the Best 40-Gallon Gas Water Heaters

IMAGEPRODUCT
  • It has a self-powering gas valve (electronic)
  • Blue diamond enhanced coating for extra durability
  • Meets all the rules set by the national appliance energy conservation act (NAECA)
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  • Energy factor for this heater is 0.57
  • Includes a limited warranty for 8 years
  • Eco-friendly burner and an intelligent microprocessor
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  • Best for the money
  • It has a glass lining tank and a dip tube made of PEX
  • This heater includes a piezo igniter and an electronic gas valve
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  • It has a sight window and a magnesium rod
  • Best Bradford White 40 gallon gas water heater
  • The lining of this tank is made up of Vitraglas enamel
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  • Best Rheem 40 Gallon gas water heater
  • The recovery rate for the first hour is 73 mph
  • Range of temperature for this heater is 80-155 ⁰F
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  • 2-inch insulation of Non-CFC foam
  • The energy factor for this heater is 0.70
  • Best AO Smith 40 Gallon gas water heater
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  • 1st-hour rating of this heater is 64
  • Best State 40 Gallon gas water heater
  • The maximum input BTUs for this heater is 40,000
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  • Includes the latest lime fighter technology
  • Best American water heater 40-gallon gas
  • This heater contains a versatile powering vent structure
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Perks of Getting a New Heater

Gas water heaters are the fastest-selling products from the home accessories market. They are very easy to use and install. They tend to provide you 100 percent ease and relaxation. Along with that, they present other benefits, which include:

Continuous Supply

These water heaters contain a storage tank. They start heating the water whenever the tank is empty. You don’t need to wait at all if you are using this water heater in your homes. It provides hot water 24/7. You can use a 40-gallon tank for multiple purposes at a single time. Thus, it is very easy to get hot water any time.

Cheaper and Easy

Gas water heaters are much easier than electric water heaters. They do not require any sort of wiring or typical connections. After buying, you just need to select the right place and install it by connecting it to your gas. They are also less expensive than other types of water heaters. They won’t increase your utility bill or maintenance cost.

Operates Under Any Conditions

These water heaters are capable of working under any conditions. You just need to have a proper gas connection. Places suffering from blackouts and electricity shortage can use these for heating water.

Why Did These Models Make Our List?

The models present on our list are there for specific reasons. We chose them because we liked the following about them:

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Size and Design

Gas water heaters are available in different sizes and designs. You can buy them according to your needs. These 40-gallon heaters have a large storage tank. They provide more than enough hot water to fulfill the needs of a large family (up to four or five members). The exterior is also worth praising. You don’t need to worry about the look and structure.

Display

These modern gas water heater aims to provide customers with maximum ease and feasibility. They contain an LED display, which helps the customer monitor the pilot and for service diagnostic. They also contain a sight window that will help in observing the burner.

Cost and Energy Star

You can find a wide range of gas water heaters available in the market. You can purchase a heater according to your budget. Secondly, these heaters have an Energy Star rating. They use 60 percent less energy and deliver maximum efficiency.

Quick Take: Best 40-Gallon Gas Water Heaters

These are our recommendations for the best 40-gallon gas water heaters:

  1. A.O. Smith GCR-40 ProMax
  2. ProLine® Master Ultra-Low NOx
  3. 12 40 UNACT Natural Gas Water Heater

Review of the Best 40-Gallon Gas Water Heaters

If you are searching for a 40-gallon gas water heater, you don’t need to waste your time by looking here and there. We’ve listed the best 40-gallon gas water heaters for your convenience. Have a look and buy one for your home.

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

PROS

  • Eco-friendly and has a compact design
  • It is highly efficient and very easy to use
  • Internal microprocessor helps in heating the water at a faster speed
  • Blue Diamond glass coating protects the heater from corroding and rusting
  • Self-powering electronic gas valve generates the necessary power during heating

CONS

  • It is a bit expensive
  • It offers a limited warranty for six years only
  • Some people reported facing leakage issues

What Recent Buyers Report

According to recent customers, this water heater is worth buying. It provides super-hot water, which is useful for taking multiple showers at a single time. The unit is working very well for them. They are very happy with its performance and features. It is the best water heater available so far in the market.

Why it Stands Out to Us

This amazing water heater stands out to us because of its high-quality performance. It is capable of storing a large amount of hot water. People can use it at any time for anything. The internal microprocessor and outer glass coating are quite impressive. This water heater will never disappoint you.

Who Will Use This Most

This water heater is useful for many applications. People can install it in their homes, apartments, cabins, and offices to get hot water. They can use it to take hot showers or relax in a steam bath. You can also use it wash dirty clothes easily.

Bottom Line

Summing it up, this water heater is one of the best heaters available in the market. People can install and use it in their homes without facing any difficulty. Moreover, it can fulfill the needs of four to five members in a family. This heater contains excellent features and specifications.

PROS

  • Eco-friendly burner produces less pollution
  • Includes an LED that shows the operation and system diagnostics
  • DynaClean's diffuser tube helps in minimizing the lime and sediment formation
  • Works using a thermopile to start the heater automatically; thus no external power is required
  • Intelligent microprocessor helps in speeding up the water heating process and optimizing the performance

CONS

  • It will increase the utility bill
  • The packaging of this heater is not good

What Recent Buyers Report

Customers have written in their reviews that this heater contains the latest technologies and microprocessors. They are very glad after using it in their homes. By using this water heater, they are able to take hot showers anytime. According to them, it deserves a lot of appreciation.

Why it Stands Out to Us

This water heater is great because it produces very little pollution. The burner of this heater is environment-friendly. The diffuser tube helps in reducing lime and sediment production in the heater. It can also heat the water within a short time, you don’t need to wait for long.

Who Will Use This Most

People can use this heater in their basements and garages for access to water for washing cars. They can also use it in their kitchens to wash greasy dishes easily. People can install it in their restrooms, which will help them in taking a soothing and relaxing hot shower.

Bottom Line

To sum it up, this water heater is useful for different types of applications. It is very easy to use and install. It contains an LED and internal microprocessor, features which are quite impressive. The LED will help you in monitoring the status of the water heater.

PROS

  • Electronic control valve helps in controlling the temperature
  • Anode rods and glass tank prevent the tank from corroding
  • Non-CFC insulation helps in minimizing air pollution
  • Piezo igniter eliminates the usage of matches and allows easy pilot ignition
  • Includes a 12-year warranty for the tank and the components, along with a 1-year warranty for the labor

CONS

  • Leakage in the tank can occur
  • Burner stops working at times
  • After some time, the tank starts to rumble

What Recent Buyers Report

This water heater is successful in fulfilling the basic expectations of the customers. They replaced their older heaters with this new, affordable water heater and reported that it provides more than enough hot water and pressure. There are hardly any bad reviews about this water heater. Customers love its quality and performance.

Why it Stands Out to Us

This water heater will never fail to provide you with hot water whenever you are in need. This tank is resistant to corrosion and rusting. The Piezo igniter helps you in igniting the heater without facing any difficulty. You can set the temperature according to your needs.

Who Will Use This Most

People can install this water heater in their farmhouse so they can enjoy a hot shower after picnics. They can also use it in their kitchens for washing and cooking. Owners of RV campsites can install it as well to have hot water at all times.

Bottom Line

In a nutshell, you will never regret buying this heater, asit will fulfill all of your requirements. You can use it for different purposes. It includes a warranty for 12 years, which means you don’t need to worry about the later expense also. It is an inexpensive and high-quality water heater.

Best Bradford White 40-Gallon Gas Water Heater:
 Bradford White RG240T6N

Bradford White 40 Gallon Natural Gas Water Heater #RG240T6N

PROS

  • Vitraglas enamel coating helps in extending the lifespan of the tank
  • Sight window will help in monitoring the burner element and pilot
  • Non-CFC insulation foam reduces heat loss from the top and sides of the tank
  • Defender FVIR system prevents the formation of flammable water vapors outside the heater
  • Hydrojet device provides faster first-hour delivery and decreases the temperature in the tank

CONS

  • The unit stops working after a few years
  • You need to relight the pilot continuously

What Recent Buyers Report

This Bradford White water heater is very easy to install, and its exterior is worth praising per the customer reviews. This heater causes fewer problems than other standard heaters. It is one of the best water heaters available in America. People have used it it without facing any typical issues.

Why it Stands Out to Us

There are no leakage issues with this water heater. It is successful in gaining customer satisfaction and positive response. We like the look of this unit a lot. There are different types of protection against heat loss. You can observe the pilot’s performance through the sight window. Thus, you will never regret buying this water heater.

Who Will Use This Most

People who live in cold and chilly areas, in particular, can use this water heater for washing, showering, cleaning, and bathing purposes. They can also install it in their cabins and offices. Chefs can use it in their cafes and restaurants to make food like coffee, tea, and pulses.

Bottom Line

Wrapping it up, this water heater is an ideal choice for people living in cold countries. They can use it to prevent illness and sickness. The features and appearance of this heater are quite impressive. You can use it for different purposes. Customers have been very happy with the result.

Best Rheem 40-Gallon Gas Water Heater:
 Rheem Residential Gas Water Heater

PROS

  • This heater requires very little maintenance
  • The burners are eco-friendly, thus it will create less pollution
  • It has a self-powering valve for controlling and monitoring gas
  • Premium-grade anodes help protect the tank from corroding or rusting
  • Lighting up the burner is very easy, you don’t need to have matches due to the Piezo ignitor

CONS

  • It has a limited warranty
  • The tank might cause leakage issues
  • Packaging of this heater is poor – parts usually break before delivery

What Recent Buyers Report

According to the reviews of recent customers, this water heater by Rheem is the best product so far. The tank is durable and strong. The exterior coating of this water heater is long-lasting. It has a large storage space for storing hot water. This heater maintains the temperature of the water for a longer period.

Why it Stands Out to Us

This water heater stands out to us because of its eco-friendly burner. It protects the heat going outside of the tank, which, in turn, maintains the temperature of the water. It is resistant to corrosion and rusting. You don’t need to spend much on maintenance and repair costs.

Who Will Use This Most

You can use this outstanding heater in your washrooms for taking a soothing hot shower or install it in your basement, garage, or kitchen. It can provide you hot water without any interference.

Bottom Line

Concluding this product, this water heater is worth praising. You will never regret buying it. Rheem promises its customers maximum comfort at an affordable rate. It contains outstanding features and specifications and you can use it for different purposes in industries, offices, and homes.

Best A.O. Smith 40-Gallon Gas Water Heater:
 A.O. Smith GPVT-40

AO Smith GPVT-40 Residential Natural Gas Water Heater

PROS

  • Includes protection (built-in) for flammable vapor ignition
  • It offers a 6-year warranty for parts and tank of the heater
  • You can ignite it without any difficulty due to the electric ignition
  • The thick 2-inch insulation of non-CFC foam increases the total efficiency
  • Heat traps on the outlet and inlet help in reducing the loss of standby heat

CONS

  • The gas valve fails after some months

What Recent Buyers Report

People have written in their reviews that this A.O. Smith water heater contains different protective features. They love to use it in their homes because of its amazing performance. It is highly efficient. Moreover, users also report the method of ignition and exterior features to be quite impressive.

Why it Stands Out to Us

This water heater includes spectacular features and specifications. The igniter and non-CFC foam insulation are successful in gaining our attention. The company offers a warranty for six years, which further provides peace of mind. The heater maintains the temperature of water for a long period of time. It does this by trapping the heat inside.

Who Will Use This Most

Owners of any hotel can install this heater in their resorts to provide their visitors maximum comfort and ease. Tourists can relax after traveling by taking hot showers. People can also use it in their homes to wash dirty clothes and greasy dishes. They can even use it to remove oily stains from their garages.

Bottom Line

The exterior coating of this water heater deserves a lot of appreciation. People can use it in their hotels, resorts, homes, and industries. It includes amazing protective features. By using this water heater, you can get hot water within a few minutes. It is a worthy investment.

Best State 40-Gallon Gas Water Heater:
 ProLine® XE Power Direct Vent

PROS

  • The slot of the screwdriver allows a straight flow of water
  • Consumes less energy compared to other water heaters
  • Hot surface igniting system is more reliable and robust than the pilot
  • Consists of a female hose, which provides faster draining during the maintenance process
  • Dip tube is made up of PEX (self-cleaning) that helps in reducing the formation of sediment and lime

CONS

  • Pressure valves might cause some problems

What Recent Buyers Report

The appearance of this water heater is quite impressive and appealing. It provides more than enough hot water for a family. It is an excellent unit that can fulfill the needs of anyone. According to customers, this State water heater is reliable and very strong. They are very happy with its performance.

Why it Stands Out to Us

We are discussing this water heater because its performance is outstanding. People who use it in their homes are very glad about the results. The igniting system and screwdriver slot are worth praising. It consumes very little energy, thus, it won't increase your utility bills.

Who Will Use This Most

People living in cold countries can install this water heater in their homes. They won't need any professional help to install it. Tired men and women can use it for taking a steam bath and making coffee after a long, tiring day to relax a bit.

Bottom Line

Summing it up, this water heater is one of the fastest-selling heaters in the marketplace. It has hardly received any sort of complaint or negative review. You can buy and install it without any tension. Its amazing features and look will automatically gain your attention.

Best American Water Heater 40-Gallon Gas:
 PV62-40T50-NVS

PROS

  • Thick 2-inch environment-friendly insulation minimizes heat loss
  • Three-position blower outlet (rotatable) helps in adding more flexibility
  • Igniter (hot surface) is durable and decreases the consumption of energy
  • It has a perfect energy factor that helps in increasing the efficiency of the water heater
  • New Lime Fighter technology helps in decreasing pockets of cold water within the tank

CONS

  • Machinery stops working at times
  • Average life for this water heater is 4 years

What Recent Buyers Report

According to recent buyers, this water heater is a great product so far. It will never disappoint you with its performance. While it comes with an expensive price tag, users find that it is a great pick and deem it a product that has satisfied them with its performance.

Why it Stands Out to Us

This water heater is great because it contains the latest technology called the Lime Fighter. This helps in providing desirable hot water and increasing the efficiency of the heater. This heater is reliable, strong, rust-free, and corrosion-free. You can use and install it without facing any sort of difficulty.

Who Will Use This Most

This water heater is useful for people living in cold areas. They can install it in their kitchens and bathrooms to get instant access to hot water at all times. You can also use it to wash your greasy dishes and oily surfaces.

Bottom Line

To sum it up, this American water heater is ideal for people living in northern areas. It is capable of providing hot water within a few seconds. It has a large storage tank and excellent features. Plus, it is very easy to install, use, and move.

What Do I Need To Know Before Buying?

Before buying any water heater, you need to know some of the aspects that need your consideration. Some of the most important aspects you need to consider are:

Drain Valves

Make sure that you check the valves of the heater. There are two types of drain valves; one is the brass valve, and the other is the plastic valve. These valves are present at the base or bottom of the water heater. Their main purpose is to drain residue from the heater. You should buy a heater that contains brass valves because they are stronger and more durable.

Warranty for Parts and Tanks

Water heaters usually have a warranty for 3 to 12 years. This warranty includes replacement and correction of the parts and tank. Some companies also offer a one-year warranty for the labor cost. Thus, you should purchase a water heater that will offer you the longest warranty. This will save money on repair and maintenance costs.

Glass Lining and Insulation

You should prefer a water heater that has a glass lining. It will help you in preventing corrosion and rust. Non-CFC insulation also helps in minimizing air pollution. It reduces heat loss, as well.

Conclusion

So if you love to have hot showers, then you must purchase a water heater capable of fulfilling all of your needs. Gas water heaters are famous for their energy efficiency and excellent performance. There is a wide range at which these heaters are available. You can purchase one according to your needs and budget.

People Also Ask

Despite our detailed reviews, you might still have some questions regarding these 40-gallon gas water heaters. With these questions in mind, you won’t be able to select the best unit for yourself. Thus, to clear out any confusion, here are answers to some frequently asked questions.

Is a 40-Gallon Water Heater Enough?

You need to select the right size gas water heater for your home. A very big water heater can increase the utility bills and a very small water heater won’t be able to fulfill your requirements. Water heaters with tanks should have enough storage to fulfill your needs. A 40-gallon water heater is capable of fulfilling the needs of a family of three to four members. So if you have a family of four members, then a 40-gallon heater is perfect for you.

Is There a Big Difference Between a 40-Gallon and 50-Gallon Water Heater?

No, there is no big difference between a 40-gallon and 50-gallon water heater. Both can fulfill the needs of a family with four to five members (for 40-gallon, 3-4). The main difference is that a 50-gallon water heater has a heating element with higher wattage reading.

How Long Can You Shower With a 40-Gallon Water Heater?

A 40-gallon water heater has a large storage tank. This heater is capable of providing you enough water for taking two showers of one hour. This is only possible if you are not using the hot water of this heater at that time for other needs. If you are using it for any other water appliance, then you must give it some time to heat the water again.

How Long Will a 40-Gallon Hot Water Tank Last?

Lasting of the hot water tank depends upon the source of the heating element. If you are using a gas 40-gallon water heater, then it will require half the time of an electric water heater for recovering. A gas water heater can heat the water again within one hour. But an electric water heater can take two hours to heat the water again.

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My name is Bob Wells and I am a retired HVAC tech from Washington state. I am currently retired and no longer do much with HVAC, however, I feel like I have a lot of knowledge in the subject and I wanted to create a website where I could talk about what I've learned and help upcoming HVAC techs. Find more info about me and HVAC Training 101.