Best Rated 40 Gallon Electric Hot Water Heater

Peter | 13-12-2023

With so many Best Rated 40 Gallon Electric Hot Water Heater brands on the market – from prominent names like A. O. Smith,Bosch Thermotechnology,Rheem,EcoSmart,thermomate,DAORDAER to smaller manufacturers – making the right choice can feel overwhelming. But we’re here to help simplify your search for the best product.

We extensively tested and evaluated dozens of top-rated Best Rated 40 Gallon Electric Hot Water Heater across various price points, spending over 100 hours comparing the contenders side-by-side. Based on our in-depth first-hand research, we compiled this list of stand-out Best Rated 40 Gallon Electric Hot Water Heater to consider. Our top recommendation is A. O. Smith Best Rated 40 Gallon Electric Hot Water Heater for its uncompromising quality and performance.

Below you’ll discover more of our favorite Best Rated 40 Gallon Electric Hot Water Heater picks. And be sure to consult our buying guide for expert insights on selecting the ideal product for your individual needs and budget. With us guiding your decision, you can shop confidently knowing you’ve chosen an exceptional Best Rated 40 Gallon Electric Hot Water Heater you’ll truly love.

Editor's Choice
A.O. Smith ENS-40 ProMax Short Electric Water Heater, 40 gal
A.O. Smith ENS-40 ProMax Short Electric Water Heater, 40 gal
Premium Pick
Bosch Thermotechnology Tronic 5000 T 40-Gallon Standard Electric Storage Water Heater (ES40M)
Bosch Thermotechnology Tronic 5000 T 40-Gallon Standard Electric Storage Water Heater (ES40M)
Budget Pick
Rheem 18kW 240V Tankless Electric Water Heater
Rheem 18kW 240V Tankless Electric Water Heater

Top 10 Best Rated 40 Gallon Electric Hot Water Heater

We researched and compared the top products in the Best Rated 40 Gallon Electric Hot Water Heater category to provide you with these recommendations.

1. A.O. Smith ENS-40 ProMax Short Electric Water Heater, 40 gal

A.O. Smith ENS-40 ProMax Short Electric Water Heater, 40 gal
9.8

A. O. Smith

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  • Permaglas glass coating protects steel tank from corrosion and maximizes tank life
  • Dynaclean diffuser dip tube helps reduce lime and sediment buildup while maximizing hot water output; made from long-lasting PEX cross-linked polymer
  • CoreGard anode rode aluminum anode with stainless steel core protects tank against corrosion longer than ordinary steel anodes
  • Durable, tamper-resistant brass drain valve
  • Meets all current regulations set forth by the National Appliance Energy Conservation Act (NAECA)

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

Bosch Thermotechnology Tronic 5000 T 40-Gallon Standard Electric Storage Water Heater (ES40M)
9.5

Bosch Thermotechnology

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  • 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.
  • WARRANTY: 10-year tank and parts limited warranty
  • EFFICIENCY: HFO foam insulated, reducing fuel costs and increasing energy efficiency. Double heating elements conserve energy. Incoloy elements for a long-lasting unit
  • CONVENIENCE: Factory-installed electric hot and cold water connections for extended tank life. Easy-to-use plastic drain valve for maintenance. Factory-installed heat traps reduce heat loss. Temperature and pressure relief valve included. Fully-automatic surface mount thermostats

3. Rheem 18kW 240V Tankless Electric Water Heater

  • External digital thermostatic control with LED display (+/1 degree accuracy)
  • Most advanced self-modulation, adjust power to meet hot water demand
  • Durable Copper immersion two heating elements, field Serviceable. Flow Rate- up to 4.4 GPM
  • Simple installation bottom 3/4 inch NPT water connections
  • Threaded for easy replacement, simple installation, digital temperature display

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

EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating
8.9

Ecosmart

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  • 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 11.5 x 8 x 3.75 inches
  • Save Energy; EcoSmart tankless electric water heaters are 99% thermal energy efficient; Only heats water when called unlike a tank heater that maintains water temperature even when not being used.
  • EcoSmart ECO 11 Sizing; 13-kilowatt tankless electric water heater ideal for providing hot water for a bathroom, small sink, office breakroom and other point-of-use or low-flow applications; provides between 1.3 and 3.1 gallons-per-minute depending on the inlet water temperature; refer to the sizing guide to select the proper solution

5. Tankless Water Heater Electric 18kW 240 Volt, thermomate On Demand Instant Endless Hot Water Heater,

Tankless Water Heater Electric 18kW 240 Volt, thermomate On Demand Instant Endless Hot Water Heater,
8.7

Thermomate

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  • [Instant Unlimited Hot Water] - REQUIRE 2 x Double-pole 40AMP Breakers to Achieve 240V for this On demand tankless electric water heater, providing hot water in 3 seconds when you need it and as long as you need, eliminating wait time, never run out of hot water again and No More cold shower
  • [Save Money and Space] - Self-modulating technology regulating the amount of energy required to heat water only when you need it with 99.8% efficient, saving up to 60% on water heating cost comparing to traditional tank water heater. Wall mounted compact size with no water tank, convenient for any spaces, saving floor space and fitting into tight spaces.
  • [Smart Operation] - Auto adjusting energy consumption basing on income water temperature and flow, ensuring maximum efficiency, continuous stable temperature and optimal power usage. Digital temperature display allowing adjustment in 1 increment from 80F to 140F. Heating element separated from water tube significantly reducing scale, corrosion and mineral buildup on the element, achieving better performance and low maintenance.
  • [Easy Installation & Safety Protection] - ETL certified with overheating protection, auto stop heating when detecting no water, quality workmanship for leakage protection
  • NOTE - Make sure this water heater is the correct size for your hot water need: 18kW at 240V draw max 76amp; Required breaker 2 x Double-POLE 40AMP; Wire gauge 2 x 8AWG; Unit size 17.12" x 13.12" x 3.12"; Water connection 3/4" NPT. 2-year limite warranty and 24/7 customer support services.

6. DAORDAER Mini Electric Tankless Water Heater 3000W 110V Constant Temperature Instant Hot Water

DAORDAER Mini Electric Tankless Water Heater 3000W 110V Constant Temperature Instant Hot Water
8.5

Daordaer

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  • INSTANT HOT WATER HEATER - Applied with 5500W heating system, the electric tankless water heater supplies instant hot water, 3 seconds to get hot water without preheating. Instant consistent and endless hot water of the maximum temperature reach to 55/131. It is perfect companion for sinks, bringing you perfect experience of comfort and relaxing.
  • REMOTE CONTROL OR TOUCH SCREEN - Ultra slim and smooth appearance design, beautiful and elegant. The temperature can be adjusted by remote control and touch control, which is more convenient to use, can avoid wet hands to adjust, and is safer; constant temperature water outlet three-level power adjustment, bid farewell to cold and hot
  • SAVE SPACE AND ENERGY - Compact design, our tankless Hot Water Heater is only the size of a small suitcase, and the wall-mount design frees up valuable floor space within your home. And tankless electric water heaters are 99% thermal energy efficient; Only heats water when called unlike a tank heater that maintains water temperature even when not being used.
  • EASY TO INSTALL - The home water heater has a mini body, easy to install in the bathroom, kitchen, and under the sink.Standard 1/2 interface(inflow or outflow), can be directly connected to household conventional hose connectors.
  • SAFE TO USE - With high temp protection, dry heating protection, and electrical leakage protection you can rest easily knowing you have safe, on-demand hot water to use on your schedule. The electric and fluid systems are completely separated to prevent electric leakage and water pipe corrosion.

7. Airthereal Electric Tankless Water Heater 18kW, 240Volts - Endless On-Demand Hot Water - Self

Airthereal Electric Tankless Water Heater 18kW, 240Volts - Endless On-Demand Hot Water - Self
8.3

Airthereal

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  • 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 dont 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.
  • Save Energy: Water is only heated when you need it, not stored in a hot water tank. The self-modulating temperature technology only uses energy to heat up water while you are using it to save up to 50% on water heating costs compared to a typical tank water heater.
  • Important Note: In order to install 18kW Electric Tankless Water Heater it requires 240 Voltage, 2 x 40 AMP Circuit Breaker Size and a set of 2 x (8AWG/2) wires. Please check to confirm that your breaker panel meet these specifications.
  • Safe To Use: With high temp protection, dry heating protection, and electrical leakage protection you can rest easily knowing you have safe, on-demand hot water to use on your schedule. The electric and fluid systems are completely separated to prevent electric leakage and water pipe corrosion.

8. Rheem SP20060 Electric Water Heater Tune-Up Kit, 2

  • Sp20060
  • Repair Kit
  • Plumber'S Pack
  • Brand Name: Rheem

9. Bosch Electric Mini-Tank Water Heater Tronic 3000 T 2.5-Gallon (ES2.5) - Eliminate Time for Hot

Bosch Electric Mini-Tank Water Heater Tronic 3000 T 2.5-Gallon (ES2.5) - Eliminate Time for Hot
7.9

Bosch Thermotechnology

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  • 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)
  • INDEPENDENT INSTALLATION: 36-37" cord plugs into a 120 volt outlet for independent installation or in-line with a large hot water source
  • FAST RECOVERY RATE: Eliminates long waits for hot water at your sink, get on demand hot water at your every need (supplies up to 2 sinks at a time)
  • EASILY MOUNTED: Can be shelf, wall or floor mounted (bracket included); simply tap into the cold water line and install the water heater directly at the sink to provide hot water

10. Bosch Electric Mini-Tank Water Heater Tronic 3000 T 7-Gallon (ES8) - Eliminate Time for Hot Water -

Bosch Electric Mini-Tank Water Heater Tronic 3000 T 7-Gallon (ES8) - Eliminate Time for Hot Water -
7.7

Bosch Thermotechnology

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  • 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
  • RELIABLE WATER SOURCE: Easily hard-wire the 7-gallon model to provide the on-demand reliable water source your home or office needs
  • IMPORTANT INFORMATION: Heating capacity of 1440 watts and a temperature range of 65-145F max. Operating pressure-150 psi. Water fittings-3/4 inch Male NPT. Electrical requirements (Amp 12A/Volts 120)
  • EASILY MOUNTED: Can be shelf or floor mounted. Wall mounting available in vertical orientation only (water connections on top) - bracket included. Simply tap into the cold water line and install the water heater directly at the sink to provide hot water

Peter

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