9 Best 40-Gallon Water Heater Of 2023

A 40-gallon water heater is a wise choice for anyone looking to have hot water throughout the day.

Thanks to its larger capacity, this water heater can store enough energy to meet your needs no matter how frequent your usage of hot water is.

Please look at this guide on 9 Best 40-Gallon Water Heaters based on capacity, technology, installation, etc.

A 40-gallon water heater would be excellent for a family of 1-4. No one would have to wait for a hot water supply.

Furthermore, it is also designed to be energy efficient, helping to keep down power bills even with frequent use over long periods.

Investing in a 40-gallon water heater will ensure you never run out of hot water and always enjoy the convenience without sacrificing your budget.

So let’s check out all our options now!

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Why Should You Buy A 40-gallon water heater? 

A 40-gallon water heater is an excellent investment for anyone who finds themselves struggling with inadequate hot water.

Compared to traditional 30 gallon models, 40-gallon water bath tanks provide up to 15% more hot water, making them perfect for larger households or those who use multiple showers at one time.

Installing a 40-gallon water heater can also save you on your energy bills over time—due to advances in tank efficiency, these models use less energy while still providing the same amount of hot water, resulting in lower costs in the long run.

If you’re looking for a reliable source of hot water that won’t break the bank but will deliver enough to meet your family’s needs, invest in a 40-gallon water heater today.

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Best 40-Gallon Water Heaters

Here are our 10 best options based on:

• Best Quality – O. Smith Water Heater
• Best Technology – Bradford White 40 Gallon Natural Gas Water Heater
• Best Capacity – AO Smith 40 Gallon 40000 BTU Water Heater
• Best Installation – O. Smith GPVL-40 ProMax Power Vent Gas Water Heater
• Best Thermo – Bosch Thermo technology 40-Gallon Standard Electric Storage Water Heater
• Best For Large Family – AO Smith BTR-200 Tank Type Water Heater 
• Best For Indoors – Rheem PROG40-40N RH67 PV Professional Classic Residential 40K BTU
• Best Size – Reliance 6-40-EOMS 100 Low Boy Electric Water Heater
• Best Material – Reliance 6-40-NOCT 400 35500 BTU 
• Best Budget – Reliance 6-40-NOCT 400 35500 BTU

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1. O. Smith Water Heater – Best Quality

Most of the time the water heater tanks start getting corroded and it decreases the life span of a product.

Well, this 40-gallon water heater has been built with permaglas glass coating that would protect the steel tank from getting rusty and it maximizes its life.

So, if you have been looking for a high-quality water heater that would last for years then you might want to have a look at this product’s features.

Features:

• The tank is made up of high-quality and durable steel with permaglas glass coating
• It has Dynaclean diffuser dip. It will reduce sediment and lime buildup whenever you maximize the water heater temperature
• The diffuser is made up of high-end quality. It has a quality PEX cross-linked polymer also.
• It has rod aluminum anode with stainless steel core. It will protect the tank from corrosion.
• It comes with a tamper resistant brass drain valve too. ¹

Pros and Cons

Product Specification

Product Dimensions	22 x 22 x 50 inches
Item Weight	124 pounds
Color	Gray
Power Source	Battery Powered
Heat Output	4500 Watts
Reach	N/A
Capacity	40 Gallons

Why this product is at the top of the list?

This product is on the top of the list because it is one of the best 40-gallon water heaters that are available in the market with all the amazing features.

The life expectancy of this product is longer than other standard water heaters because it has been built with high-quality and durable material. 

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2. Bradford White 40 Gallon Natural Gas Water Heater – Best Technology

Sedimentation build-up in the water tank will affect the quality of water.

This sedimentation takes place whenever you set the water heater temperature maximum.

Sedimentation build-up won’t happen if you buy this 40-gallon water heater that uses natural gas for heating water.

The cold water inlet won’t let the sedimentation take place inside the hot water tank. ²

Features:

• It comes with millivolt-powered technology and a piezo igniter. 
• Advanced temperature control technology will help in maintaining the temperature
• You can press the resettable thermal switch if you want to reset all the settings
• It has advanced screen lock technology flame arrestor design 
• The cold water inlet sediment will help in preventing sedimentation build-up inside the tank

Pros and Cons

Product Specification

Product Dimensions	20 x 20 x 60.5 inches
Item Weight	‎134 Pounds
Color	Green, White
Power Source	Natural Gas
Heat Output	N/A
Reach	N/A
Capacity	40 Gallons

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3. AO Smith 40 Gallon 40000 BTU Water Heater – Best Capacity

If you are tired of paying the electricity bills of your water heater and now you want an economical solution then this product helps you.

Yes, this water heater works on gas and it will provide you with 40 gallons of hot water without making a hole in your wallet every month. 

Features:

• Lower energy consumption and an economical performance
• It consumes 40,000 BTU gas 
• It has a 0.62 energy factor that simply makes it an energy star
• The tank comes with 6 years warranty

This gas water heater meets with NOx emission requirements ¹

Pros and Cons

Product Specification

Product Dimensions	N/A
Item Weight	‎N/A
Color	Gray
Power Source	Natural Gas
Heat Output	40,000 BTU
Reach	N/A
Capacity	40 Gallons

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4. O. Smith GPVL-40 ProMax Power Vent Gas Water Heater – Best installation

With large families, the hot water needs also increase. Sometimes you have to wait for the water to get heated so you can take shower or do your other house chores.

Well, you don’t have to wait anymore because now you can get this gas water heater that doesn’t only helps you to save on electricity bills but within no time it will warm up the water. 

Features:

• With 3 positions rotatable blower outlet, you can install this water heater anywhere inside your home 
• It has Dynaclean II dip tubes that optimize the water pressure in the inlet for minimizing cold water regions inside the tank
• It has state of the art electronic gas control that will keep a check on the temperature inside the tank
• The LED would show the operation state of the water heater
• It has a hot-surface igniter that is more energy-efficient as compared to standing pilot

Pros and Cons

Product Specification

Product Dimensions	22 x 22 x 59 inches
Item Weight	‎‎189 Pounds
Color	Gray
Power Source	Natural Gas
Heat Output	N/A
Reach	N/A
Capacity	40 Gallons

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5. Bosch Thermo Technology 40-Gallon Standard Electric Storage Water Heater – Best Thermo

While heating up the water most of the time the water heaters get all corroded if not made up of high-quality material.

This corrosion element will affect the lifespan of the water heater.

So if you want a long-lasting and durable electric water heater then you might want to consider this product.

Features:

• It would easily fit under your stairs, maintenance closet, or any crawl space
• With two magnesium anode rods, the tank gets extra protection
• The tank has been constructed with heavy gauges steel and a dielectric heat trap
• The tank comes with 10 years of warranty
• The HFO foams will help in reducing energy consumption

Pros and Cons

Product Specification

Product Dimensions	20.25 x 20.25 x 49.14 inches
Item Weight	100.5 Pounds
Color	Gray
Power Source	AC
Heat Output	N/A
Reach	N/A
Capacity	40 Gallons

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6. AO Smith BTR-200 Tank Type Water Heater - Best For Large Family

You can get rid of your high energy-consuming water heater soon but this doesn’t mean that you start using cold water.

Well, you can get this thermal efficient water heater that would provide you with an instant hot supply without consuming much electricity. 

Features:

• With 100 gallons water capacity, you get a consistent hot water supply
• It consumes 199,000 BTU and comes with electric ignition
• A CSA certified gas water heater
• You can clean its insides from the handhole 

Pros and Cons

Product Specification

Product Dimensions	30.25 x 30.25 x 72 inches
Item Weight	‎629 pounds
Color	Cream
Power Source	Natural Gas
Heat Output	199,000 BTU
Reach	N/A
Capacity	100 Gallons

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7. Rheem PROG40-40N RH67 PV Professional Classic Residential 40K BTU – Best For Indoors

This residential water heater would simply use the indoor air for combustion and the blower exhausts the gasses for warming up the water.

Maintaining this product is super easy because it won’t need much cleaning.

You can install this water heater anywhere inside your home. It has been basically designed for residential use. 

Features:

• This heater would use indoor air for combustion and warming up the water
• It comes with a fuel shut-off device 
• No maintenance and filter cleaning would be required
• The Rheum R-tech anode rod would provide the tank protection against corrosion
• The long venting lengths up to 100 ft. 

Pros and Cons

Product Specification

Product Dimensions	21 x 21 x 65 inches
Item Weight	160 pounds
Color	Gray
Power Source	Natural Gas
Heat Output	40,000 BTU
Reach	N/A
Capacity	40 Gallons

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8. Reliance 6-40-EOMS 100 Low Boy Electric Water Heater – Best Size

With Pex polymer lined heat trap up nipples, the heat wastage will get reduced by 60%. Yes, it will help you save from electric bills. 

Features:

• It consumes 4500W of electricity and provides 38 gallons of hot water supply
• It comes with copper sheathed heating elements to make this product durable
• It has been constructed with high-quality aluminum and copper
• A battery-powered electric water heater
• It comes with Pex polymer lined heat trap up nipples

Pros and Cons

Product Specification

Product Dimensions	1 x 27.13 x 37 inches
Item Weight	120.7 pounds
Color	Gray
Power Source	Battery Powered
Heat Output	40,000 BTU
Reach	N/A
Capacity	38 Gallons

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9. Reliance 6-40-NOCT 400 35500 BTU – Best Material

There would be no heat leakage if you get this product because it comes with Pex polymer lined heat trap nipples.

Features:

• It comes with Pex polymer lined heat trap nipples to trap heat inside the tank
• It consumes 35,500 BTU and provides 40 gallons of hot water supply
• High-quality stainless steel and aluminum has been used for constructing this product
• Glass-lined anodes will help in protecting the tank against corrosion
• It has built-in auto electric ignition

Pros and Cons

Product Specification

Product Dimensions	1 x 21.13 x 61.81 inches
Item Weight	‎150 Pounds
Color	Gray
Power Source	Natural Gas
Heat Output	500 BTU
Reach	N/A
Capacity	40 Gallons

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Comparison

PRODUCT	Rating	Price	Best For	Power Source	Wattage	Capacity
O. Smith Water Heater	3.6/5	$925.76	Quality	Battery Powered	4500W	40 Gallons
Bradford White 40 Gallon Natural Gas Water Heater	3.2/5	$873.76	Technology	Wind Powered	N/A	40 Gallons
AO Smith 40 Gallon 40000 BTU Water Heater	N/A	$957.00	Capacity	Gas Powered	N/A	40 Gallons
O. Smith GPVL-40 ProMax Power Vent Gas Water Heater	N/A	$2549.98	Installation	Gas Powered	N/A	40 Gallons
Bosch Thermo Technology 40-Gallon Standard Electric Storage Water Heater	3.6/5	$759.02	Thermo	Battery Powered	N/A	40 Gallons

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What To Keep In Mind While Buying A 40-gallon water heater?

It is time to say goodbye to your old energy-consuming water heater and say hello to your new 40-gallon water heater.

Here are a few facts that you need to ask first before you finalize any 40-gallon water heater:

• Construction material

The material of the heater has to be of high quality or else it won’t last long. 

• Features 

Every 40-gallon water heater will have its own features. So have a brief look at all of them because they will help you to make your final decision.

• Energy consumption 

How much energy the water heater would consume? Whether it will consume electricity or work on propane gas for heating up the water?

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Conclusion

We hope you found a suitable 40-gallon heater for yourself based on the list that we shared with you above.

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Frequently Asked Questions

How Many Hot Showers Can You Take With A 40-Gallon Water Heater?

A 40-gallon heater could provide hot water for 4 average-length hot showers. 

For How Many People A 40-Gallon Water Heater Would Be Enough?

For 1-4 people, a 40-gallon water heater would be enough. 

What Would Be An Approximate Life Expectancy Of A 40-Gallon Water Heater?

An approximate life expectancy of a 40-gallon water heater is about 8-12 years.

Is A 40-Gallon Water Heater A Family Water Heater?

Yes, definitely a 40-gallon water heater is a family water heater.