Top 14 Best 40 Gallon Hot Water Heaters 2022 (Reviews)

1. Bosch Thermotechnology Tronic 5000 T 40-Gallon Standard Electric Storage Water Heater

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

Bosch Thermotechnology Tronic 5000 T 40-Gallon Standard Electric Storage Water HeaterBosch Thermotechnology Tronic 5000 T 40-Gallon Standard Electric Storage Water HeaterBosch Thermotechnology Tronic 5000 T 40-Gallon Standard Electric Storage Water HeaterBosch Thermotechnology Tronic 5000 T 40-Gallon Standard Electric Storage Water HeaterBosch Thermotechnology Tronic 5000 T 40-Gallon Standard Electric Storage Water Heater
  • 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
  • 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.
  • 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
  • EFFICIENCY: HFO foam insulated, reducing fuel costs and increasing energy efficiency. Double heating elements conserve energy. Incoloy elements for a long-lasting unit

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2. A.O. Smith ENS-40 ProMax Short Electric Water Heater

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

A.O. Smith ENS-40 ProMax Short Electric Water Heater
  • Dynaclean diffuser dip tube helps reduce lime and sediment buildup while maximizing hot water output; made from long-lasting PEX cross-linked polymer
  • Permaglas glass coating protects steel tank from corrosion and maximizes tank life
  • 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)

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3. Bradford White 40 Gallon Natural Gas Water Heater #RG240T6N

Bradford White 40 Gallon Natural Gas Water Heater #RG240T6N

  • Resettable Thermal Switch
  • Advanced ScreenLok Technology Flame Arrestor Design
  • Bradford White ICON System
  • Maintenance-Fre
  • Factory-Installed Hydrojet Total Performance System

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4. HOT WATER TANK HEATER INSULATION JACKET DIY ‘PREMIUM’ KIT :ENERGY SAVING REFLECTIVE FOIL FITS 40 GALLON

HOT WATER TANK HEATER INSULATION JACKET DIY

HOT WATER TANK HEATER INSULATION JACKET DIY 'PREMIUM' KIT :ENERGY SAVING REFLECTIVE FOIL FITS 40 GALLONHOT WATER TANK HEATER INSULATION JACKET DIY 'PREMIUM' KIT :ENERGY SAVING REFLECTIVE FOIL FITS 40 GALLONHOT WATER TANK HEATER INSULATION JACKET DIY 'PREMIUM' KIT :ENERGY SAVING REFLECTIVE FOIL FITS 40 GALLONHOT WATER TANK HEATER INSULATION JACKET DIY 'PREMIUM' KIT :ENERGY SAVING REFLECTIVE FOIL FITS 40 GALLON
  • Complete Kit is ‘Fire Rated’. No ‘Foam’ Spacers (fire hazard),No Fiberglass. Non-Toxic,No Carcinogenics,No Fibers,’Class 1/Class A’ Fire Rating.Suitable for both Gas and Electric Hot Water Tanks.
  • Patented Reflective Foil Stops 97% of Radiant Heat Loss and helps maintain standby water temperature.Original Manufacturer of this Kit for 27 years.Average Consumer Payback is 6-12 months. Improves the Energy Efficiency of your home.
  • DO-IT-YOURSELF Complete Kit comes with: Foil Body(48″ height x 76″ circumference),Foil Spacers, Foil Tape. Easy to follow Instructions.Comes complete with all material and step-by-step instructions. Tools required,Tape Measure,Utility Knife/Scissors and Straight edge.Lightweight,clean,easy to install.ALSO AVAILABLE IN OUR 50-60 Gallon DIY KIT.

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

EZ Ultra HE Natural Gas Indoor Condensing Tankless Water Heater

EZ Ultra HE Natural Gas Indoor Condensing Tankless Water HeaterEZ Ultra HE Natural Gas Indoor Condensing Tankless Water HeaterEZ Ultra HE Natural Gas Indoor Condensing Tankless Water HeaterEZ Ultra HE Natural Gas Indoor Condensing Tankless Water Heater
  • Condensing Technology – The EZ Ultra HE uses exhaust gas to preheat incoming water for added efficiency.
  • This heater can be vented horizontally or vertically using 2″ Solid Core Schedule 40 PVC/CPVC
  • Capacity Up to 3.4 GPM @ 45F Rise In Ambient Temperature
  • FREE SHIPPING
  • Back-draft prevention device and stainless steel horizontal vent pipe are included.

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6. AES NASA Tech Heavy Duty Reflective Foam Core Non Fiberglass 40 Gallon Water Heater Tank Insulation Wrap

AES NASA Tech Heavy Duty Reflective Foam Core Non Fiberglass 40 Gallon Water Heater Tank Insulation Wrap

AES NASA Tech Heavy Duty Reflective Foam Core Non Fiberglass 40 Gallon Water Heater Tank Insulation WrapAES NASA Tech Heavy Duty Reflective Foam Core Non Fiberglass 40 Gallon Water Heater Tank Insulation WrapAES NASA Tech Heavy Duty Reflective Foam Core Non Fiberglass 40 Gallon Water Heater Tank Insulation WrapAES NASA Tech Heavy Duty Reflective Foam Core Non Fiberglass 40 Gallon Water Heater Tank Insulation WrapAES NASA Tech Heavy Duty Reflective Foam Core Non Fiberglass 40 Gallon Water Heater Tank Insulation Wrap
  • Nasa Tech Heavy Duty Reflective Foam Core Non Fiberglass 40 Gallon Water Heater Tank Insulation Wrap

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7. EcoSmart ECO 11 Electric Tankless Water Heater

EcoSmart ECO 11 Electric Tankless Water Heater

EcoSmart ECO 11 Electric Tankless Water HeaterEcoSmart ECO 11 Electric Tankless Water HeaterEcoSmart ECO 11 Electric Tankless Water HeaterEcoSmart ECO 11 Electric Tankless Water HeaterEcoSmart ECO 11 Electric Tankless Water Heater
  • Wattage: 13000.0

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8. ecosmart ECO 18 Electric Tankless Water Heater

ecosmart ECO 18 Electric Tankless Water Heater

ecosmart ECO 18 Electric Tankless Water Heaterecosmart ECO 18 Electric Tankless Water Heaterecosmart ECO 18 Electric Tankless Water Heaterecosmart ECO 18 Electric Tankless Water Heaterecosmart ECO 18 Electric Tankless Water Heater
  • Save up to 60% on your water heating costs with the most advanced, self modulating technology available
  • The product is highly durable
  • 75 A
  • Amperage (amps): 75. Activation flow: 0. 3 GPM. Flow Rate @ 35 F Rise (gallons/min): 3. 51 gal (US)/min
  • Save up to 12 cubic feet of storage space.
  • The product is easy to use
  • The product works and is compatible with 2 X 40 AMP (DP) breakers and 2 X 8 AWG wire
  • Manufactured in China
  • Never run out of hot water with an ECOSMART tankless water heater.
  • Lifetime warranty for residential use
  • Digital temperature control in 1-degree increments gives users complete control of hot water

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9. Frost King SP57/11C All Season Water Heater Insulation Blanket

Frost King SP57/11C All Season Water Heater Insulation Blanket

  • 3” Thick x 48” x 75”, R10
  • Vinyl backed fiberglass insulation blankets are designed for gas, oil or electric water heaters up to 60 gallon size
  • Package contains a roll of plastic tape
  • Improves Heater efficiency

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10. Tankless Water Heater, 3.17 GPM Instant Hot Natural Gas Water Heater with Constant Temperature

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

Tankless Water Heater, 3.17 GPM Instant Hot Natural Gas Water Heater with Constant TemperatureTankless Water Heater, 3.17 GPM Instant Hot Natural Gas Water Heater with Constant TemperatureTankless Water Heater, 3.17 GPM Instant Hot Natural Gas Water Heater with Constant TemperatureTankless Water Heater, 3.17 GPM Instant Hot Natural Gas Water Heater with Constant TemperatureTankless Water Heater, 3.17 GPM Instant Hot Natural Gas Water Heater with Constant Temperature
  • Note: Please download and read the installation manual and product manual carefully when purchasing the product to ensure that your installation environment is consistent with this product. When installing, please strictly follow the installation manual and installation instruction video, otherwise it may not work. If you have any questions about the product, please contact us by email. We have a professional technical support team.
  • 【High Sensitive Touch Led Display】Comes with smart digital LED display high-definition large screen, freely adjustable the temperature between 30℃-65℃.
  • 【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.
  • 【Quality Material】Made with brushed stainless steel material, the natural gas water heater has the function of high temperature resistance, corrosion resistance. Built-in oxygen-free copper water tank, long service time.
  • 【Multiple Security Protection】The natural gas water heater is upgraded with 12 protection methods to ensure your safety. Such as dry burning protection, over 65℃(149 °F) protection, leakage protection, etc.
  • 【Energy and Money Saving】The hot water heater adjusts power input based on flow rate and temp setting in real time. Summer/winter 2 modes to save up to 60% on your natural gas costs.

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11. Tankless Water Heater Electric 240V, On Demand Hot Water Heater Digital Display 5

Tankless Water Heater Electric 240V, On Demand Hot Water Heater Digital Display 5

Tankless Water Heater Electric 240V, On Demand Hot Water Heater Digital Display 5Tankless Water Heater Electric 240V, On Demand Hot Water Heater Digital Display 5Tankless Water Heater Electric 240V, On Demand Hot Water Heater Digital Display 5Tankless Water Heater Electric 240V, On Demand Hot Water Heater Digital Display 5Tankless Water Heater Electric 240V, On Demand Hot Water Heater Digital Display 5
  • 【CONVENIENT USE】The tankless water heater comes with digital display & touch control panel so temp setting is easy job. Now turn on the tap and let the smart unit do the rest, you needn’t go through hard lesson about temp setting by a mixer tap without any hint. This Black model does not comes with Remote control, useful for installation under sink.
  • 【INSTANT & SUFFICIENT HOT WATER】Applied with 5.5KW heating system, the electric water heater supplies instant, consistent and endless hot water of 116℉or higher temp shortly, no waiting for preheat nor terrible temp up & down, perfect companion for sinks. Time to get rid of those “lukewarm” toys.
  • 【SMART SELF ADJUSTMENT】The hot water heater adjusts power input based on flow rate and temp setting in real time. For example, less power will be applied by the system when waterflow reduced, thus you still get ideal temperature instead of scalding hot water, which means comfortable experience. Optimal energy efficiency of 98% saves considerable electric charge.
  • 【SAFE and DURABLE】Applied with multiple protection devices, every piece goes through strict tests to ensure 100% safe. Inner water and electricity lines are designed to run separately so as to avoid leakage or harm of scale build up. Approval by ETL and qualifies for UL, you can expect outstanding performance for years to come.
  • 【POINT of USE】The sleek tankless water heater is compact as an oatmeal box, making it possible to install anywhere close to outlet and avoid energy waste. It can be mounted horizontally, vertically, obliquely, ideal for kitchen, bar, school, hospital, community and hair salon. Please verify it is the right size for you: [email protected]; dimensions 11″ x 7.5″ x 2.35″; pipes fittings :1/2″ NPT.

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12. Camco Aluminum Anode Rod – Extends the Life of Your Water Heater Tank by Absorbing Corrosion Causing Particles

Camco Aluminum Anode Rod - Extends the Life of Your Water Heater Tank by Absorbing Corrosion Causing Particles

  • Anode Type: ¾-inch OD aluminum anode
  • Sacrificial Rod: Anode Rod extends the life of your water heater tank; water corrodes the rod rather than your steel tank
  • Length: 42-inch overall length
  • Construction: Plated Hex Bushing
  • Thread Size: ¾-inch – 14NPT threads

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13. EWH-01 Electric Water Heater Tune-Up Kit

EWH-01 Electric Water Heater Tune-Up Kit

EWH-01 Electric Water Heater Tune-Up KitEWH-01 Electric Water Heater Tune-Up KitEWH-01 Electric Water Heater Tune-Up KitEWH-01 Electric Water Heater Tune-Up KitEWH-01 Electric Water Heater Tune-Up Kit
  • 【ONE YEAR WARRANTY】Include (1) Upper Water Heater Thermostat, (1) Lower Water Heater Thermostat, 120V ~ 480V
  • 【ONE YEAR WARRANTY】DROMIX Include (2) 4500W 240V COPPER Water Heater Element, Insert Length: 13-9/16″. [email protected]
  • 【Interchangeable】Therm-O-Disc Type Thermostat, Can interchange with APCOM type.
  • 【More Durable】Extra Longer Life of Heating Element with Chromed Coating on the Heating Area
  • 【Versatile Fits】The Tune-up Kits in Plumber’s pack Fits Most Water Heaters with Dual Elements – Rheem, A.O Smith, Whirlpool, GE, Richmond, Ruud, BRADFORD WHITE; CRAFTMASTER; GENERAL ELECTRIC; GS WOOD; KENMORE; LOCHINVAR; RELIANCE; RICHMOND; STATE; MOR-FLO; APCOM etc

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14. SmartJacket Water Heater Blanket Insulation System

SmartJacket Water Heater Blanket Insulation System

SmartJacket Water Heater Blanket Insulation SystemSmartJacket Water Heater Blanket Insulation SystemSmartJacket Water Heater Blanket Insulation System
  • WATER HEATER BLANKET – SmartJACKET is a unique system that creates a space between the blanket and the water heater tank to achieve better results.
  • IMPROVE EFFICIENCY – Improve the efficiency of 95% of all water heaters in use today, Reduce Heat loss Up to 40 %.
  • SIMPLE INSTALLATION – Easy to install and easy to clean, fits gas or electric water heaters.
  • ENVIRONMENTALLY FRIENDLY – Non-toxic, non-carcinogenic. Contains no fiberglass.
  • PROTECT YOUR INVESTMENT – Prolongs the life of your water heater, Fits all 20 to 60 gallon tanks.

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