Best 40 Gallon Water Heaters (April 2024) - Rated by CherryPicks' Experts

At a Glance: Our Top Picks

Top 1

Bosch Thermotechnology Tronic 5000 T 40-Gallon Standard Electric Storage Wate...

9.9
CPR Score
Top 2

Bradford White 40 Gallon Natural Gas Water Heater #RG240T6N

9.7
CPR Score
Top 3

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

9.6
CPR Score
Tips


Our team has analyzed 161 products of different Rough Plumbing brands, including Generic, EcoSmart, RecPro, AIRTHEREAL, Bosch Thermotechnology, Rheem, Stiebel Eltron, Reliance Water Heater, Bradford White, FOGATTI, Noritz, AO Smith, Reliance, Duda Solar And Runnatal. The following list of top 29 40 Gallon Water Heaters is prepared for the customers by analyzing 161 40 Gallon Water Heaters reviews and comparing different features. 

* Cherrypicksreviews.com is reader-supported, Our editor review, and recommend the best products based on extensive data analysis, if you click on the product links, we may earn a commission through qualifying products purchased.

The Best 40 Gallon Water Heaters Rated by CherryPicks

Market Overview
40 Gallon Water Heaters Reviewed
  • Reviews Analyzed: 13,037 Items
  • CPR Avg. Rating: 8.5 / 10
29 Products Evaluated
  • Highest Price: $1,950.00
  • Lowest Price: $179.99
  • Avg. Price: $840.57
Price Disclaimer

Top 29 40 Gallon Water Heaters on Amazon (Verified You can Buy)

Bosch Thermotechnology Tronic 5000 T 40-Gallon Standard Electric Storage Water Heater (ES40M)

Bosch Thermotechnology
7738007319
20.25 x 20.25 x 49.14 Inches
100.5 Pounds

Ratings for Bosch Thermotechnology (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -

Features

APPLICATION: Dimensions : 20.25" W x 49.14" H x 20.25" 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.
Show More

Bradford White 40 Gallon Natural Gas Water Heater #RG240T6N

Bradford White
RG40T6N
20.0 x 20.0 x 60.5 Inches
134.0 Pounds

Ratings for Bradford White (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
✅ HomePlumbing ✅ -
Streem -

Features

Bradford White ICON System
Advanced ScreenLok Technology Flame Arrestor Design
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Reliance 6-40-NOCT 400 35500 BTU Tall Natural Gas Water Heater, 40 gallon

Reliance
6-40-NOCT 400
1.0 x 21.13 x 61.81 Inches
150.0 Pounds

Ratings for Reliance (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Ember Gear -
Goods2Easy -

Features

Pex polymer lined heat trap nipples
Aluminum anode rod
Show More
Top 4

Reliance 6-40-NOMT400 61-3/4" x 20" D 35500 BTU Mobile Home Water Heater with Gas Standard Tank, 62 Energy Factor and 2" Foam Insulation, 40 gallon

Reliance
TS 140 LIH
1.0 x 23.0 x 61.5 Inches
150.0 Pounds

Ratings for Reliance (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Hearthshire 105

Features

Condensing Compact
Space Saving
Show More
Top 5

Bradford White 40 Gallon - 36,000 BTU Defender Safety System High Efficiency Residential Atmospheric Water Heater (LP Gas)

Generic

Ratings for Generic (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Franko Trade -

Features

Intended Household: 2-3 Person, Fuel Type: Propane, Capacity (Gallons): 40, BTU Input: 36000, 1st Hour Delivery (Gallons): 76
Venting: Atmospheric, Height (Inches): 60.125", Diameter (Inches): 20", Weight (lbs): 136 lbs, Warranty: 6-Year Limited Tank/ 6-Year Limited on Component Parts
Show More
Top 6

Rheem 72-40-2 240V / 4500W 40 Gallon Electric Water Heater

Rheem
72-40-2

Ratings for Rheem (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -

Features

Rheemglas lined tank
R-Foam insulation
Show More
Top 7

150 Liter 40 Gallon Stainless Steel Solar Hot Water Heater Tank Single Copper Coil Heat Exchanger

Duda Solar
tank151
18.5 x 18.5 x 59.06 Inches
88.18 Pounds

Ratings for Duda Solar (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Duda Energy -

Features

Inner Tank: Food Grade SUS 304-2B, Outer Tank: Galvanized Steel 0.5 mm thickness
Insulation: high pressure automatic polyurethane foaming layer, Density of 36 kg/m3, R-Value: 12.5
Show More
Top 8

Bradford White 40 Gallon - Energy Saver Electric Residential Water Heater, 240V

Generic

Ratings for Generic (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Franko Trade -

Features

Intended Household: 2-3 Person, Fuel Type: Electric, Capacity (Gallons): 40, Height (Inches): 48.75", Diameter (Inches): 20"
Water Connection: 3/4", 1st Hour Delivery (Gallons): 55, Electric Connection: 3/4", Warranty: 6-Year Limited Tank/ 6-Year Limited on Component Parts, Energy Factor: 0.95
Show More
Top 9

Bradford White 40 Gallon - 34,000 BTU Defender Safety System High Efficiency Residential Atmospheric Water Heater (Propane)

Generic

Ratings for Generic (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Franko Trade -

Features

Intended Household: 2-3 Person, Fuel Type: Propane, Capacity (Gallons): 40, BTU Input: 34000, 1st Hour Delivery (Gallons): 64
Venting: Atmospheric, Features: Energy Star Qualified, Height (Inches): 61.25", Diameter (Inches): 18", Weight (lbs): 132 lbs
Show More
Top 10

AO Smith 40 Gallon - 36,000 BTU ProLine Plus High Efficiency Residential Gas Water Heater - Tall Model, LP Gas (10 Yr Warranty)

Generic

Ratings for Generic (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Franko Trade -

AO Smith 40 Gallon 40,000 BTU Water Heater

AO Smith
WH-GCR-40S

Ratings for AO Smith (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
ResearchWaterFilters -
Heat and Air Wholesale -

Features

40 gallon tank
40,000 BTU
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Rheem 18kW 240V Tankless Electric Water Heater

Rheem
RTEX-18
18.5 x 14.5 x 3.5 Inches
14.78 Pounds

Ratings for Rheem (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -
CARESAN -
ALCRSOAN -
CASA CAYOS -

Features

External digital thermostatic control with LED display (+/1 degree accuracy)
Most advanced self-modulation, adjust power to meet hot water demand
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Rheem Professional Classic Series 50 Gallon Capacity 4.5 kW Tall Electric Water Heater PROE50 T2 RH95

Generic
PROE50 T2 RH95
20.25 x 20.25 x 61.63 Inches
121.0 Pounds

Ratings for Generic (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
MRO Next Day -

Features

0.93 Uniform Energy Factor (UEF)
21 GPH Recovery at 90°F Rise
Show More

AO Smith 40 GAL 36,000 BTU Water Heater

AO Smith
WH-GCR-40T

Ratings for AO Smith (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
ResearchWaterFilters -
Heat and Air Wholesale -

Features

40 gallon tank
36,000 BTU gas burner
Show More

Rheem RTG-70XLP-1 Tankless Water Heater, Grey, Grey

Rheem
RTG-70XLP-1
9.88 x 13.88 x 25.63 Inches
54.0 Pounds

Ratings for Rheem (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -
Amazon Warehouse 1

Features

Continuous Hot Water – never run out of hot water, even with back-to-back showers
Tankless Gas Water Heaters are cost saving and energy efficient
Show More

Rheem RTEX-24 24kW 240V Electric Tankless Water Heater, Gray

Rheem
RTEX-24
18.25 x 14.5 x 3.5 Inches
17.8 Pounds

Ratings for Rheem (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -
GM Not Mo -

Features

ON/OFF Dial Control with adjustable digital temperature display
Self-modulating power control
Show More

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

Runnatal
Natural Gas
21.0 x 14.0 x 5.0 Inches

Ratings for Runnatal (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Runnatal -

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.
Show More

Stiebel Eltron 239223 Tankless Water Heater – Tempra 29 Plus – Electric, On Demand Hot Water, Eco, White, 23

Stiebel Eltron
239223
4.63 x 16.63 x 14.5 Inches
1.0 Pounds

Ratings for Stiebel Eltron (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -
FruityFlix LLC -

Features

On demand a continuous and unlimited supply of hot water
Sleek design saves space and no venting required, It also features two different temperature memory presets, making it easy to adjust for personalized needs.
Show More

EcoSmart ECO 27 Tankless Water Heater, Electric, 27-kW - Quantity 1, 17 x 17 x 3.5

EcoSmart
ECO 27
3.625 x 17.0 x 17.0 Inches
16.8 Pounds

Ratings for EcoSmart (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -

Features

Endless on-Demand Hot Water; Consistent hot water when you need it that never runs out; Continuously monitored water temperature and controlled flow rates ensure efficiency and consistent performance within 1 degree of selected temperature
Save Space; EcoSmart tankless electric water heaters are 90% smaller than traditional tank heaters; may be installed on wall or at point of use; Dimensions 17 x 17 x 3.75 inches 
Show More

Bosch Thermotechnology 46-Gallon Low Boy Electric Storage Water Heater, Gray (7738007324)

Bosch Thermotechnology
7738007324
26.25 x 26.25 x 34.5 Inches
131.7 Pounds

Ratings for Bosch Thermotechnology (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -

Features

APPLICATION: Dimensions: 26.25" W x 34.50" H x 26.25" 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.
Show More

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

Rheem
RTGH-95DVLN-2
27.5 x 9.75 x 28.5 Inches
77.0 Pounds

Ratings for Rheem (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -

Features

Hot water without the wait - or the waste
Low operating cost - High energy efficiency and water savings setting
Show More

FOGATTI Natural Gas Tankless Water Heater, Indoor 5.1 GPM, 120,000 BTU Instant Hot Water Heater, InstaGas Classic 120 Series

FOGATTI
HIU-FDG420IN-CS120-NG-F02
22.76 x 14.57 x 7.0 Inches

Ratings for FOGATTI (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
HaiNaDS -

Features

【Smaller size and better performance】It is only 1/4 the size of a 50 gallon tank water heater, yet it produces approximately 5.1 GPM of hot water through 120,000 BTU for both bathroom and kitchen hot water demand. The highly integrated components also provide greater safety from water pressure surges without the need to install an expansion tank.
【Fast and endless supply of hot water】The heat exchanger quickly heats the water to a maximum of 140℉ in a short time, and the hot water is quickly piped through to the shower and tap. No need to wait for the water temperature to heat up slowly like a tank water heater. After that it continues to operate at approximately 5.1 GPM for 40 minutes, which is enough time to produce almost 200 gallons of hot water.
Show More

FOGATTI Natural Gas Tankless Water Heater, Indoor 7.5 GPM, 170,000 BTU White Instant Hot Water Heater, InstaGas Comfort 170 Series

FOGATTI
FGD24IN
26.2 x 17.1 x 7.3 Inches
40.0 Pounds

Ratings for FOGATTI (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
HaiNaDS -

Features

We recommend that all installations of units must be done by 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.
Show More

Rheem Mid-Efficiency 8.4GPM Outdoor Natural Gas Tankless Water Heater

Rheem
RTG-84XLN-1
8.88 x 13.88 x 23.63 Inches
57.0 Pounds

Ratings for Rheem (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -

Features

Exclusive Water Savings technology conserving up to 1, 100 gallons per year
157, 000 BTU (gas consumed per hour)
Show More

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

EcoSmart
ECO 11
3.75 x 8.0 x 11.5 Inches
6.5 Pounds

Ratings for EcoSmart (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -
718 Sold It 4,922

Features

Endless On-Demand Hot Water; Consistent hot water when you need it that never runs out; Continuously monitored water temperature and controlled flow rates ensure efficiency and consistent performance within 1 degree of selected temperature.Amperage Draw : 54 A
Save Space; EcoSmart tankless electric water heaters are 90% smaller than traditional tank heaters; may be installed on wall or at point of use; Dimensions 11.5 x 8 x 3.75 inches
Show More

RELIANCE WATER HEATER CO 6-30-EOLBS 100 30 gallon Electric Water Heater

Reliance Water Heater
6-30-EOLBS 100
22.0 x 22.0 x 30.0 Inches
90.0 Pounds

Ratings for Reliance Water Heater (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
MAGELLAN DISTRIBUTION CORPORATION -
Factory Hardware Store -
Dry 24 Water Restoration LLC -

Features

Pex polymer lined heat trap nipples
Aluminum anode rod
Show More

Noritz NRC66DVNG Indoor Condensing Direct Tankless Hot Water Heater, 6.6 GPM - Natural Gas

Noritz
NRC661-DV-NG
6.7 x 13.8 x 23.6 Inches
39.0 Pounds

Ratings for Noritz (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -
NYDIRECT -

Features

Endless hot water
Can be vented with Schedule 40 PVC Pipe and Fitting
Show More

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
9kW
16.14 x 9.84 x 2.6 Inches

Ratings for AIRTHEREAL (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Sain Store -

Features

☼ 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.
Show More

RecPro RV Tankless Hot Water Heater | On Demand Gas Heater | Remote Control Included (Black)

RecPro

Ratings for RecPro (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
RecPro® 1,196

Features

No more waiting for the water tank to warm up or running out of warm water halfway through your shower. With this amazing machine, you can have a steady stream of hot water flowing to your faucets or shower without waiting for the tank to warm up.
There is a forced exhaust structure that keeps the air safe and clean while and after entering the combustion chamber. There is also a dust net to make sure no dirt gets into the tankless water heater.
Show More

Top 10 40 Gallon Water Heaters - Verified to Buy (Apr. 2024)

Top 10 40 Gallon Water Heaters Brands on Amazon

Here is the list of top-rated brands that were evaluated by CherryPicks.

  • Bosch Thermotechnology
  • Bradford White
  • Reliance
  • Generic
  • Rheem
  • Duda Solar
  • AO Smith
  • Runnatal
  • Stiebel Eltron
  • EcoSmart

Related 40 Gallon Water Heaters Guides

For more personalized 40 Gallon Water Heaters guides, Check those pages,


Top 10 40 Gallon Water Heaters Sellers: CPR Seller Rank List

CPR sellers rank is based on CherryPicks-AI bestselling ranking system that helps us analyze each seller's sales trends. The List of top seller ranks is our in-house data, essential for our product ranking to help you make the right shopping choice.

Rank Name Yearly Feedbacks Avg. Ratings
🥇 Amazon Warehouse 4,312,804 4.5
🥈 Hearthshire 12,364 4.8
🥉 RecPro® 2,842 4.7
4 718 Sold It 1,051 4.7
5 Sain Store 498 4.8
6 Factory Hardware Store 395 4.4
7 Ember Gear 395 4.8
8 Amazon.com 385 4.7
9 Duda Energy 372 4.8
10 ✅ HomePlumbing ✅ 292 4.8
View or download top 40 Gallon Water Heaters seller & rating report
Amazon Warehouse [4312804] Hearthshire [12364] RecPro® [2842] 718 Sold It [1051] Sain Store [498] Factory Hardware Store [395] Ember Gear [395] Amazon.com [385] Duda Energy [372] ✅ HomePlumbing ✅ [292] Amazon Warehouse 100% Hearthshire 0% RecPro® 0% 718 Sold It 0% Sain Store 0% Factory Hardware Store 0% Ember Gear 0% Amazon.com 0% Duda Energy 0% ✅ HomePlumbing ✅ 0%

[Get] 40 Gallon Water Heaters Deals (✅Exclusively for Prime)

What does "Amazon Fulfilled" Mean?

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When you order a product that is "Amazon Fulfilled," Amazon takes care of the storage, packing, shipping, and customer service for that product. This often ensures quicker delivery and better customer service compared to products that are not fulfilled by Amazon. It also means that the product is eligible for Amazon's return policy.

What does "Prime" Mean?

"Prime" refers to Amazon Prime Member (Join Amazon Prime Now), which indicates eligibility for Prime benefits. When you see "Prime" next to a product on Amazon, This generally means that if you are  an Amazon Prime member, you can get free two-day shipping on that product, and sometimes even same-day or one-day shipping depending on your location.

Prime members also have access to other benefits, including 2-Day ShippingExclusive Member DealsPrime VideoBuy With PrimeAmazon MusicPrime Gaming, and more.

Shop Prime 40 Gallon Water Heaters Deals

What does "Free Shipping" Mean?

"Free Shipping" means that you will not be charged additional fees for the shipping of that product. However, unlike "Prime," which usually guarantees fast two-day shipping, "Free Shipping" doesn't necessarily mean fast shipping.

Sometimes there might be a minimum purchase requirement to qualify for free shipping if you are not a Prime member. For Prime members, the "Free Shipping" usually refers to the free two-day shipping that is one of the benefits of the Prime membership.


Why Should You Trust Us?

Now hundreds and thousands of Rough Plumbing supplies are available on Amazon, Picking the right one is not easy, and that may take a lot of your time, Right? and What is the best 40 Gallon Water Heaters to buy for new April 2024?

CherryPicks’s Methodology for Evaluating 40 Gallon Water Heaters

We developed the CherryRatings-AI system to identify and score reviews and the CherryPicks-AI ranking system that uses TensorFlow framework to generate the best list, It will help us evaluate Rough Plumbing items that sell on Amazon. The score of items is based on over ten parameters such as analyzing customer review content, product reviewing rating statistics, brand reputation evaluation, comparing product price with features, etc, You can visit How We Rank to learn more in detail.

We collected and analyzed 161 of 40 Gallon Water Heaters reviews based on our selection criteria. It helped us shortlist the top qualified and rated 40 Gallon Water Heaters for Rough Plumbing, We found that most customers choose 40 Gallon Water Heaters with an average price of $840.57, and the top brands are Generic, EcoSmart, RecPro, AIRTHEREAL, Bosch Thermotechnology, Rheem, Stiebel Eltron, Reliance Water Heater, Bradford White, FOGATTI, Noritz, AO Smith, Reliance, Duda Solar And Runnatal. 

Then our expert-level editors reviewed all those quality items and selected the top 29 40 Gallon Water Heaters for you, We have researched hundreds of sellers and picked the top sellers for Rough Plumbing, including Amazon Warehouse, Hearthshire, RecPro®, 718 Sold It, Sain Store, Factory Hardware Store, Ember Gear, Amazon.com, Duda Energy, ✅ HomePlumbing ✅, MRO Next Day And MAGELLAN DISTRIBUTION CORPORATION. The Bosch Thermotechnology Tronic 5000 T 40-Gallon ... are available for purchase right now, and The seller of #1 rank product has received honest feedback from 46 consumers with an average rating of 4.3.

We've helped a lot of satisfied users get the right Tools & Home Improvement product based on their needs, and save lots of time for them to pick 40 Gallon Water Heaters to buy.


Written By Hunter Lambrick

Hunter Lambrick is a contributing writer on the Cherrypicksreview platform who specializes in writing articles on outdoor events and home tool products. He has been doing this for a while now and has developed a wealth of experience in it.