10 Reviews: Best 40 Gallon Gas Water Heaters (Jul 2021)

These 40-gallon gas water heaters can provide you with hot water on demand anytime you need it.

S. M. Rosyida By S. M. Rosyida · updated on · price $399.99 - $1,999.00 · 47 views

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Comparison Table

Product Image
1
10 Reviews: Best 40 Gallon Gas Water Heaters (Jul  2021): Energy-Saving Water Heater
AO Smith
2
10 Reviews: Best 40 Gallon Gas Water Heaters (Jul  2021): Excellent Tankless Water Heater
Noritz
3
10 Reviews: Best 40 Gallon Gas Water Heaters (Jul  2021): Electronic Gas Control
AO Smith
4
10 Reviews: Best 40 Gallon Gas Water Heaters (Jul  2021): Tough Tall Water Heater
Rheem
5
10 Reviews: Best 40 Gallon Gas Water Heaters (Jul  2021): Low Maintenance Water Heater
Reliance
6
10 Reviews: Best 40 Gallon Gas Water Heaters (Jul  2021): Space-Saving Water Heater
Rinnai
7
10 Reviews: Best 40 Gallon Gas Water Heaters (Jul  2021): Modern Black Glassy Water Heater
Camplux
8
10 Reviews: Best 40 Gallon Gas Water Heaters (Jul  2021): Water Heater with Smart Features
Bradford
9
10 Reviews: Best 40 Gallon Gas Water Heaters (Jul  2021): Automatic Water Heater
EZ Tankless
10
10 Reviews: Best 40 Gallon Gas Water Heaters (Jul  2021): Maintenance-Free Water Heater
Sure Comfort
Product Name ProLine® 40-Gallon Propane Water Heater Tankless Water Heater 6.6 GPM (Standard Vent) GPVL-40 ProMax Power Vent Gas Water Heater Performance 40 Gal. Tall 6-Year 36,000 BTU Natural... 50 Gallon Tall Natural Gas Water Heater RU180in-Natural Gas/10 Indoor Tankless Natural Gas Water Heater White 40 Gallon Natural Gas Water Heater Ultra HE Natural Gas Indoor Condensing Tankless Wa... 40 Gal. Tall 3 Year 34,000 BTU Natural Gas Tank Wa...
Features Energy-Saving Water Heater Excellent Tankless Water Heater Electronic Gas Control Tough Tall Water Heater Low Maintenance Water Heater Space-Saving Water Heater Modern Black Glassy Water Heater Water Heater with Smart Features Automatic Water Heater Maintenance-Free Water Heater
FUEL TYPE Propane Gas Gas Natural Gas Natural Gas Gas ‎Natural Gas ‎Natural Gas Gas Natural Gas
MEASUREMENTS 58 1/4" x 20" x 20" ‎27.2 x 18.3 x 9.4 inches ‎22 x 22 x 59 inches 19" x 19" x 58.5" 22" x 22" x 22" ‎18.5 x 11.45 x 31.3 inches ‎14.37 x 4.72 x 25.39 inches ‎20 x 20 x 60.5 inches ‎27 x 14.5 x 6.5 inches 18.5" x 18.5" x 58.5"
WEIGHT 150 lbs ‎85 pounds ‎189 pounds 127 lbs n/a ‎64 pounds ‎28.7 pounds ‎134 pounds ‎31 pounds 125 lbs
FLOW RATE n/a ‎6.6 Gallons Per Minute n/a n/a n/a n/a ‎3.18 Gallons Per Minute n/a ‎3.4 Gallons Per Minute n/a
price $758.55 $1,299.99 $1,377.68 $469.00 $1,061.99 $1,999.00 $399.99 $799.99 $619.99 $429.00
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A 40-gallon water heater appears to be the optimal size for the majority of households of two to three people, which is why it is possibly the most widely used water heating system on earth. Available in several distinct versions in the marketplace would make it a little bit confusing to choose the proper one. All you need is one that is both functionally efficient and effective in lowering your electricity bills. As a result, we’ve gone through the market one by one and discovered the top ten 40 gallon gas water heaters, which will make your search a lot easier. Let’s have a peek, shall we?

Frequently Asked Questions (FAQs)

In case you don't know

How do I choose a water heater?

Consider the following:
1. Type of fuel. The fuel type or energy source you use for water heating will affect not only the annual operating costs of the water heater, but also its size and energy efficiency.
2. Dimensions. Make sure to select one that is a perfect fit for your space.
3. Energy efficiency. It is critical to understand how much electricity you will spend on the water heater by selecting the Volt and Wattage.

Should I turn my water heater off at night?

It is common knowledge that it is preferable to leave the hot water heater on all of the time rather than turning it on and off. But, in reality, you don't need to heat your water all the time. Your immersion heater or boiler will heat stored hot water in a tank.

What is the standard size hot water tank?

Most homes have a water heater that holds between 40 and 60 gallons. Larger tanks are typically used in homes with a hot tub or other hot water requirements. Alternatively, you can follow one of the experts' rules:
1. 30-40 gallons for 1 to 2 people
2. 40-50 gallons for 2 to 3 people
3. 50-60 gallons for 3 to 4 people
4. For groups of 5 or more people: 60-80 gallons

Which is better electric or gas water heater?

These are the two most common types of water heaters. Natural gas is used to generate the energy required to heat water in gas water heaters, whereas electric resistance coils are used in electric heaters. Both are suitable for installation in your home, but you should consider factors such as your energy bill and the efficiency of your entire family before deciding which one is best for you.

10 Reviews: Best 40 Gallon Gas Water Heaters (Jul 2021)

AO Smith ProLine® 40-Gallon Propane Water Heater - Best 40 Gallon Gas Water Heaters: Energy-Saving Water Heater
https://www.hotwater.com/

1.
AO Smith
ProLine® 40-Gallon Propane Water Heater

Energy-Saving Water Heater

price from
$758.55
Our Opinion:

Starting with this ProLine® water heater, designed to help you save money on your energy costs while still providing hot water for you and your family. Built with eco-friendly non-CFC foam insulation, external heat traps, and a combustion chamber, this product is ideal for maximizing operational cost reductions. Furthermore, with one-hand push-button spark ignition, control is a breeze.

Promising Review:

Bought this 6 weeks ago and it’s been wonderful. An enormous upgrade from the unit we had for several previous years (different brand). Would highly recommend.

by willispat93

FUEL TYPE Propane
MEASUREMENTS 58 1/4" x 20" x 20"
WEIGHT 150 lbs
FLOW RATE n/a
Noritz Tankless Water Heater 6.6 GPM (Standard Vent)  - Best 40 Gallon Gas Water Heaters: Excellent Tankless Water Heater
https://www.amazon.com/

2.
Noritz
Tankless Water Heater 6.6 GPM (Standard Vent)

Excellent Tankless Water Heater

price from
$1,299.99
Our Opinion:

The next item on the list is this Noritz water heater, which will provide you with limitless hot water anytime you require it. This tankless water heater features a K-Copper heat exchanger, making it the most robust and efficient in its class. It's also a tankless water heater, which means it takes up less space.

Promising Review:

relatively easy to install, the unit comes with all the necesities for the exaust, but can be just plugged into the exhaust of the old water heater tank, so no climbing on the roof was needed! Ahhh.

It has been several months and the unit works great and took place of the two 40 gallon water heaters.

by tioligirl - take it or leave it

FUEL TYPE Gas
MEASUREMENTS ‎27.2 x 18.3 x 9.4 inches
WEIGHT ‎85 pounds
FLOW RATE ‎6.6 Gallons Per Minute
AO Smith GPVL-40 ProMax Power Vent Gas Water Heater - Best 40 Gallon Gas Water Heaters: Electronic Gas Control
https://www.amazon.com/

3.
AO Smith
GPVL-40 ProMax Power Vent Gas Water Heater

Electronic Gas Control

price from
$1,377.68
Our Opinion:

This water heater has a state-of-the-art electronic gas control that allows for more precise temperature control. It also includes an LED control light display, allowing you to easily control this water heater. It is made of 2" thick, ecologically friendly foam insulation, which helps to decrease heat loss as well as contributes to overall energy efficiency.

FUEL TYPE Gas
MEASUREMENTS ‎22 x 22 x 59 inches
WEIGHT ‎189 pounds
FLOW RATE n/a
Rheem Performance 40 Gal. Tall 6-Year 36,000 BTU Natural Gas Tank Water Heater - Best 40 Gallon Gas Water Heaters: Tough Tall Water Heater
https://www.homedepot.com/

4.
Rheem
Performance 40 Gal. Tall 6-Year 36,000 BTU Natural Gas Tank Water Heater

Tough Tall Water Heater

price from
$469.00
Our Opinion:

Rheem, a well-known company, offers this natural gas tall water heater with a 36,000 BTU/hour environmentally safe low NOx burner that can provide plenty of hot water. This water heater is tough because it has a premium-grade anode rod that protects the tank for a long time. Simply press the button to turn it on, then sit back and enjoy the warm water.

Promising Review:

The water heater was really easy to install and definitely meets our hot water needs!

by Eddie

FUEL TYPE Natural Gas
MEASUREMENTS 19" x 19" x 58.5"
WEIGHT 127 lbs
FLOW RATE n/a
Reliance 50 Gallon Tall Natural Gas Water Heater - Best 40 Gallon Gas Water Heaters: Low Maintenance Water Heater
https://www.reliancewaterheaters.com/

5.
Reliance
50 Gallon Tall Natural Gas Water Heater

Low Maintenance Water Heater

price from
$1,061.99
Our Opinion:

Another Rheem product, this time having a glass-lined tank and dual heavy-duty anode rods, making it more durable and resistant to corrosion. Thanks to the electronic gas control valve technology, this heater is designed to give exact temperature control and operational status. It also has a self-cleaning Sta-Kleen® PEX dip tube, which helps to cut down on maintenance.

Promising Review:

Water heater was installed very smoothly and looks like a good product

by RK

FUEL TYPE Natural Gas
MEASUREMENTS 22" x 22" x 22"
WEIGHT n/a
FLOW RATE n/a
Rinnai RU180in-Natural Gas/10 - Best 40 Gallon Gas Water Heaters: Space-Saving Water Heater
https://www.amazon.com/

6.
Rinnai
RU180in-Natural Gas/10

Space-Saving Water Heater

price from
$1,999.00
Our Opinion:

In such a little space, this natural gas water heater is ideal. As you can see, it comes with a suitcase-sized mount that allows it to be neatly placed on the wall, freeing up extra usable space in your home. One of the features that we like about this heater is that the hot water is always ready, thanks to ThermaCirc360 technology, which also provides faster hot water via an extra pump that is offered separately.

Promising Review:

Looks great installed, efficiently works smooth.

by Charles M.

FUEL TYPE Gas
MEASUREMENTS ‎18.5 x 11.45 x 31.3 inches
WEIGHT ‎64 pounds
FLOW RATE n/a
Camplux Indoor Tankless Natural Gas Water Heater - Best 40 Gallon Gas Water Heaters: Modern Black Glassy Water Heater
https://www.amazon.com/

7.
Camplux
Indoor Tankless Natural Gas Water Heater

Modern Black Glassy Water Heater

price from
$399.99
Our Opinion:

This water heater is sleek, modern, and compact, with a distinct black glassy front panel. Imagine how amazing it will look in your environment. It also has LED touchscreen controls with a digital display and a Fahrenheit display, allowing you to conveniently regulate this water heater. Don't worry, it's also built with many safety features including combustion, flame failure, anti-freezing protection, and overheating protection to keep you safe.

Promising Review:

This heater is awesome. The build quality is excellent. The performance is very good also. This will provide plenty of hot water. It is very efficient and sips propane. If you are looking for a propane water heater, this machine is an excellent combination of price, features, quality, and performance.

by Amazon Customer

FUEL TYPE ‎Natural Gas
MEASUREMENTS ‎14.37 x 4.72 x 25.39 inches
WEIGHT ‎28.7 pounds
FLOW RATE ‎3.18 Gallons Per Minute
Bradford White 40 Gallon Natural Gas Water Heater - Best 40 Gallon Gas Water Heaters: Water Heater with Smart Features
https://www.amazon.com/

8.
Bradford
White 40 Gallon Natural Gas Water Heater

Water Heater with Smart Features

price from
$799.99
Our Opinion:

This Bradford water heater, which comes in a white hue, will not only give hot water for your comfort but also a good look that will complement your environment. For easy control, with smart features like superior Screenlok technology flame arrestor design and resettable thermal switch. It's also supposed to be a maintenance-free water heater, which is why it's worth thinking about for its practicality.

Promising Review:

Works great and easy to install. We never run out of hot water now. I would recommend this and give it a five rating.

by Rick Keeling

FUEL TYPE ‎Natural Gas
MEASUREMENTS ‎20 x 20 x 60.5 inches
WEIGHT ‎134 pounds
FLOW RATE n/a
EZ Tankless Ultra HE Natural Gas Indoor Condensing Tankless Water Heater  - Best 40 Gallon Gas Water Heaters: Automatic Water Heater
https://www.amazon.com/

9.
EZ Tankless
Ultra HE Natural Gas Indoor Condensing Tankless Water Heater

Automatic Water Heater

price from
$619.99
Our Opinion:

Whether the vent is installed horizontally or vertically, this water heater is a lifesaver for giving hot water, allowing you to take a hot shower whenever you want. It's a completely automatic water heater, so all you have to do is switch on the faucet or shower, and hot water will appear in a matter of seconds. The tankless heater will also automatically switch off after the tap is turned off.

Promising Review:

Love my new tankless hot water heater, what a difference it makes. Highly recommended.

by Judy Bradley

FUEL TYPE Gas
MEASUREMENTS ‎27 x 14.5 x 6.5 inches
WEIGHT ‎31 pounds
FLOW RATE ‎3.4 Gallons Per Minute
Sure Comfort 40 Gal. Tall 3 Year 34,000 BTU Natural Gas Tank Water Heater - Best 40 Gallon Gas Water Heaters: Maintenance-Free Water Heater
https://www.homedepot.com/

10.
Sure Comfort
40 Gal. Tall 3 Year 34,000 BTU Natural Gas Tank Water Heater

Maintenance-Free Water Heater

price from
$429.00
Our Opinion:

Finally, the Sure Comfort is here to ensure that you have real comfort while showering with hot water whenever you need it. This water heater, on the other hand, has a piezo ignition technology that ensures both safety and ease of use. It also includes a maintenance-free combustion air intake system, which eliminates the need to clean and replace filters.

Promising Review:

worth the price would purchase again!

by Granny

FUEL TYPE Natural Gas
MEASUREMENTS 18.5" x 18.5" x 58.5"
WEIGHT 125 lbs
FLOW RATE n/a

Conclusion

Well, now it's your turn to choose the fittest one for your need. Don't worry, all products listed on our list above are worth considering for their durability and efficiency to help you get the warm or hot water you desired. Good luck!

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