Best 20 Gallon Water Heaters (April 2024) - Rated by CherryPicks' Experts

At a Glance: Our Top Picks

Top 1

Raritan 20 Gal Water Heater W/O Heat Exchanger 120V

9.9
CPR Score
Top 2

Reliance 6-20-SOMS K 20GAL ELEC Water Heater, 20 Gallon

9.8
CPR Score
Top 3

RHEEM/RICHMOND 6ep20-1, 2000 W, 120 Vac, Tank Richmond Electric Water Heater,...

9.7
CPR Score
Tips


Our 20 Gallon Water Heaters Ranking is based on our detailed analysis of 89 20 Gallon Water Heaters and over 27,070 customer reviews. We have compiled the top 30 Best 20 Gallon Water Heaters you might be interested in and ratings based on product 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 20 Gallon Water Heaters Rated by CherryPicks

Market Overview
20 Gallon Water Heaters Reviewed
  • Reviews Analyzed: 27,070 Items
  • CPR Avg. Rating: 8.5 / 10
30 Products Evaluated
  • Highest Price: $3,434.43
  • Lowest Price: $172.68
  • Avg. Price: $613.69
Price Disclaimer

Top 30 20 Gallon Water Heaters on Amazon (Verified You can Buy)

Top 1

Raritan 20 Gal Water Heater W/O Heat Exchanger 120V

Raritan
172001
22.0 x 22.0 x 28.0 Inches
65.0 pounds

Ratings for Raritan (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Prime Marine -
Less Is Always More ✱AUTHORIZED SELLER✱ -

Features

Raritan 20-Gallon Hot Water Heater w/o Heat Exchanger - 120V

Reliance 6-20-SOMS K 20GAL ELEC Water Heater, 20 Gallon

Reliance
6-20-SOMS K
20.0 x 18.8 x 33.5 Inches
68.0 Pounds

Ratings for Reliance (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
PLEXSUPPLY. 828
Dry 24 Water Restoration LLC -

Features

Provides secure connections to components and lines
Top 3

RHEEM/RICHMOND 6ep20-1, 2000 W, 120 Vac, Tank Richmond Electric Water Heater, 20 Gal, 20 gallon

Richmond
6EP20-1
23.3 x 21.3 x 28.0 Inches
69.0 Pounds

Ratings for Richmond (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
67 Hardware -

Features

Item Weight: 69.0 lb
Country of Origin: United States
Show More

AO Smith EJCT-20 Residential Electric Water Heater

AO Smith
EJCT-20
16.0 x 16.0 x 31.625 Inches

Ratings for AO Smith (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Plumbing Planet -

Features

Compact design
Side-Mounted Plumbing and Electrical Connections
Show More

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
Show More
Top 6

Ariston 19 Gal POU Electric Water Heater

Ariston
ARI POU-20 120V 1500W
18.2 x 18.2 x 25.5 Inches

Ratings for Ariston (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Ariston -

Features

Compact designed 19 gallon electric water heater. Provides instant hot water at point of use. 6-year limited warranty on tank.
Durable glass-lined heavy gauge carbon steel tank that tolerates high temperatures for years of trouble-free service.
Show More
Top 7

RARITAN Raritan 20-Gallon Hot Water Heater w/Heat Exchanger - 120V / 172011 /

Raritan
172011
28.0 x 22.0 x 22.0 Inches
73.0 Pounds

Ratings for Raritan (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Jarboys Outdoors & Marine Supplies -AUTHORIZED 9,327
The Factory Depot 5,311

Features

Raritan 20-Gallon Hot Water Heater w/Heat Exchanger - 120V

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

Bosch Electric Mini-Tank Water Heater Tronic 3000 T 2.5-Gallon (ES2.5) - Eliminate Time for Hot Water - Shelf, Wall or Floor Mounted

Bosch Thermotechnology
7738004996
13.75 x 10.75 x 13.75 Inches
15.5 Pounds

Ratings for Bosch Thermotechnology (CPR Score)

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

Features

CONVENIENT HOT WATER HEATER: 2.5 gallon point-of-use mini-tank fits under your sink to provide hot water right where you need it. Thermal efficiency is 98%. Dimensions : 13.75 W x 13.75 H x 10.75 D Inches
LONG LASTING QUALITY: This electric water heater is easy to maintain and has premium glass-lined material for a long service life. (Amps 12A, Volts (VAC) 120)
Show More

Stiebel Eltron 233219 2.5 gallon, 1300W, 120V SHC 2.5 Mini-Tank Electric Water Heater

Stiebel Eltron
233219
11.0 x 10.63 x 18.69 Inches
15.9 Pounds

Ratings for Stiebel Eltron (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -
Tool Country 8,064
ShipIQ ✅ 3,675

Features

Plugs into standard 120 volt outlet
T and P valve included
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

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

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

Stiebel Eltron 235089 SHC 6 6 Gallon Water Heater, 6 Gal

Stiebel Eltron
235089
15.0 x 15.0 x 20.0 Inches
26.5 Pounds

Ratings for Stiebel Eltron (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -
SIM Supply, Inc. 3,112

Features

The SHC 6 gallon mini-tank 120 V

Ariston Andris 8 Gallon 120-Volt Point of Use Mini-Tank Electric Water Heater

Ariston
15.25 x 17.5 x 17.5 Inches

Ratings for Ariston (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Ariston -

Features

Compact design; wall or floor mounted (wall bracket included)
Provide immediate hot water at the point of use; install as booster or standalone
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

Reliance 10 Gallon 6 10 SOMSK Electric Water Heater, White

Reliance
6 10 SOMSK
19.8 x 18.5 x 19.8 Inches
41.0 Pounds

Ratings for Reliance (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
MAGELLAN DISTRIBUTION CORPORATION -
PLEXSUPPLY. 828
Fondaaro -
Suppliesonline -
The Factory Depot 5,311

Features

Water heater
10 gallon short, 6 year warranty, electric.
Show More

Ecosmart ECO 24 24 KW at 240-Volt Electric Tankless Water Heater with Patented Self Modulating Technology, 17 x 17 x 3.5

EcoSmart
ECO24
3.75 x 17.0 x 17.0 Inches
14.25 Pounds

Ratings for EcoSmart (CPR Score)

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

Features

Sleek and compact design with digital output temperature display
ECOSMART tankless water heaters are 99.8-percent energy efficient
Show More
Top 19

HoldRite QuickStand Ceiling Mounted Water Heater Platform, Up to 20 Gallons, Hanging, 40-SWHP

Holdrite
40-SWHP
0.03 x 24.5 x 24.5 Inches
21.8 Pounds

Ratings for Holdrite (CPR Score)

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

Features

WATER HEATER PLATFORM: QuickStand ceiling-mounted water heater platforms are ideal for supporting water heaters, water source heat pumps, fan coil units, and remote chillers; watertight and pre-assembled with a built-in drain pan and drain fitting
COMPATIBILITY: This water tank stand adapts to 3/8 inch or 1/2 inch threaded hanger rod
Show More

Bosch Electric Mini-Tank Water Heater Tronic 3000 T 7-Gallon (ES8) - Eliminate Time for Hot Water - Shelf, Wall or Floor Mounted

Bosch Thermotechnology
ES8 Tronic 3000 T
21.0 x 20.5 x 16.5 Inches
29.5 Pounds

Ratings for Bosch Thermotechnology (CPR Score)

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

Features

CONVENIENT HOT WATER HEATER: 7 gallon point-of-use mini-tank fits under your sink to provide hot water right where you need it. Thermal efficiency is 98%. Dimensions : 17.5 W x 17.5 H x 14.5 D Inches
INSTALLED VERTICALLY OR HORIZONTALLY: This larger model can be mounted vertically (5.1 gal. of water supply) or horizontally (7 gal. of water supply)- vertical orientation is installed with the cold and hot lines on top of the unit
Show More
Top 21

AO Smith 20 Gallon Dura-Power DEL Commercial Electric Water Heater - Lowboy

Generic

Ratings for Generic (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Franko Trade -

Features

Fuel Type: Electric
ASME: No
Show More

Rinnai RL75IN Tankless Hot Water Heater, 7.5 GPM, Natural Gas, Indoor Installation

Rinnai
RL75iN
17.5 x 13.0 x 31.0 Inches
54.0 Pounds

Ratings for Rinnai (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -
eFaucets 9,655

Features

Original Design: Tankless hot water heater's Circ-Logic technology offers recirculation patterns that match your habits; For the latest in non-condensing technology that speeds up service and installation, check out our new RE160iN model
Never Run Out of Hot Water with this Compact Tankless Gas Water Heater: Non-condensing tankless hot water heater from Rinnai is only the size of a small suitcase and fits in a wide variety of spaces, but provides up to 7.5 GPM (5 fixtures at once)
Show More

Rheem 240V Heating Chamber RTEX-13 Residential Tankless Water Heater, GRAY

Rheem
RTEX-13
12.63 x 8.25 x 3.63 Inches
0.0006 Pounds

Ratings for Rheem (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
PRODUCT X MAS 6,745
CARESAN -
ALCRSOAN -
CASA CAYOS -
Bullit Sales -

Features

External adjustable digital thermostatic control with LED display (+/1 degree accuracy
Durable Copper immersion two heating elements, field Serviceable.Self-modulating power control
Show More

Camplux ME40 Mini Tank Electric Water Heater 4-Gallon with Cord Plug,120 Volts

CAMPLUX ENJOY OUTDOOR LIFE
11.75 x 10.38 x 19.25 Inches

Ratings for CAMPLUX ENJOY OUTDOOR LIFE (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Camplux -

Features

Saving Energy & Money- Built in insulation foam, reduces heat loss. 4-gallon point-of-use mini-tank fits under your sink to provide hot water right where you need it.
High Quality Built & Elegant Design- Camplux electric water heater has glass-lined tank for long service life and easy to maintain. Elegant streamline design cover, made your kitchen more pretty.
Show More

AO Smith EJCS-20 Residential Electric Water Heater

AO Smith
EJCS-20
18.0 x 18.0 x 24.75 Inches
61.0 Pounds

Ratings for AO Smith (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Plumbing Planet -

Features

Compact design
Side-mounted plumbing and electrical connections
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
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

Airthereal Electric Tankless Water Heater 18kW, 240Volts - Endless On-Demand Hot Water - Self Modulates to Save Energy Use - Small Enough to Install Anywhere - for 2 Showers, Evening Tide series

AIRTHEREAL
18kW
17.25 x 12.22 x 3.43 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
Top 29

Ruud 20 Gallon 2KW Professional Achiever Electric Point-of-Use Water Heater, 6 Year (120v)

Generic

Ratings for Generic (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Franko Trade -

Features

Application: Plumbing
Fuel Type: Electric
Show More

Eemax EEM24013 Electric Tankless Water Heater, Blue

Eemax
EEM24013
11.5 x 8.0 x 3.75 Inches

Ratings for Eemax (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -
Daily Drops 6,656

Features

Tank less water heaters provide a continuous Supply of hot water and only heats the water you need, when you need it
Instant, consistent and endless hot water
Show More

Top 10 20 Gallon Water Heaters - Verified to Buy (Apr. 2024)

Top 10 20 Gallon Water Heaters Brands on Amazon

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

  • Raritan
  • Reliance
  • Richmond
  • AO Smith
  • Rheem
  • Ariston
  • EcoSmart
  • Bosch Thermotechnology
  • Stiebel Eltron
  • RecPro

Related 20 Gallon Water Heaters Guides

For more personalized 20 Gallon Water Heaters guides, Check those pages,


Top 10 20 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
🥈 PLEXSUPPLY. 3,578 4.8
🥉 RecPro® 2,842 4.7
4 SIM Supply, Inc. 1,470 4.7
5 ShipIQ ✅ 1,309 4.7
6 718 Sold It 1,051 4.7
7 The Factory Depot 991 4.7
8 Daily Drops 830 4.9
9 PRODUCT X MAS 819 4.9
10 Tool Country 710 4.9
View or download top 20 Gallon Water Heaters seller & rating report
Amazon Warehouse [4312804] PLEXSUPPLY. [3578] RecPro® [2842] SIM Supply, Inc. [1470] ShipIQ ✅ [1309] 718 Sold It [1051] The Factory Depot [991] Daily Drops [830] PRODUCT X MAS [819] Tool Country [710] Amazon Warehouse 100% PLEXSUPPLY. 0% RecPro® 0% SIM Supply, Inc. 0% ShipIQ ✅ 0% 718 Sold It 0% The Factory Depot 0% Daily Drops 0% PRODUCT X MAS 0% Tool Country 0%

[Get] 20 Gallon Water Heaters Deals (✅Exclusively for Prime)

What does "Amazon Fulfilled" Mean?

Amazon Fulfilled refers to products handled by Amazon's logistics, which indicates that the product is stored, packed, and shipped by Amazon from one of its fulfillment centers.

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 20 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 20 Gallon Water Heaters to buy for new April 2024?

CherryPicks’s Methodology for Evaluating 20 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 89 of 20 Gallon Water Heaters reviews based on our selection criteria. It helped us shortlist the top qualified and rated 20 Gallon Water Heaters for Rough Plumbing, We found that most customers choose 20 Gallon Water Heaters with an average price of $613.69, and the top brands are Generic, EcoSmart, RecPro, AIRTHEREAL, Bosch Thermotechnology, Rheem, Stiebel Eltron, CAMPLUX ENJOY OUTDOOR LIFE, Rinnai, Reliance Water Heater, Eemax, Holdrite, Ariston, Bradford White, Raritan, AO Smith, Reliance And Richmond. 

Then our expert-level editors reviewed all those quality items and selected the top 30 20 Gallon Water Heaters for you, We have researched hundreds of sellers and picked the top sellers for Rough Plumbing, including Amazon Warehouse, PLEXSUPPLY., RecPro®, SIM Supply, Inc., ShipIQ ✅, 718 Sold It, The Factory Depot, Daily Drops, PRODUCT X MAS, Tool Country, eFaucets And Less Is Always More ✱AUTHORIZED SELLER✱. The Raritan 20 Gal Water Heater W/O Heat Exchanger ... are available for purchase right now, and The seller of #1 rank product has received honest feedback from 2 consumers with an average rating of 5.0.

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 20 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.