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20 Best Tankless Water Heater For Well Water (2023 Updated)

A tankless water heater for well water is a device that heats water as it is needed, without the use of a tank. This type of heater is often used in homes or businesses that have a well, as it can provide a continuous supply of hot water.

20 Best Tankless Water Heater For Well Water

Product Image Product Name Features Price

Rinnai RUR199iN 199,000 BTU Indoor Natural GAS Tankless Water Heater

  • Professional installation required; call 84-GO-Rinnai for assistance.
  • ENERGY STAR Qualified with Uniform Energy Factor of .93.

Ecosmart 27 Tankless Electric Water Heater

  • 27kw

Rinnai RU180iN 180,000 BTU Indoor Natural GAS Tankless Water Heater

  • 130,000 Btu

Rinnai RSC160iN Super High Efficiency Plus 9 GPM 160,000 BTU Natural GAS Interior Tankless Water Heater

  • 9 Gpm / 160,000 Btu

Rinnai V94IN Internal Natural GAS Tankless Water Heater

  • Compact design: saves space
  • Never run out of hot water
  • Up to twice the lifespan of most tanks

Stiebel Eltron Tempra 12 Trend Whole House Electric Tankless Water Heater

  • 12

Rheem RTEX-13 Professional Classic Electric Tankless Hot Water Heater

  • 13kw

Rheem Performance 24 KW Self-Modulating 4.6 GPM Electric Tankless Water Heater

  • up to 6 GPMWater-Saver Shower Head
  • 1.5 GPMStandard Shower Head
  • 2.0 GPMStandard Hand Sink

Stiebel Eltron Tempra 24 Plus Tankless Electric Water Heater

  • 24 Plus Tankless

Rheem RTEX-27 208/240 VAC, Commercial/Residential Electric Tankless Water Heater

  • up to 6 GPMWater-Saver Shower Head
  • 1.5 GPMStandard Shower Head
  • 2.0 GPMStandard Hand Sink

Electric Tankless Water Heater,8000W, Size: 2 in RTEX-08

  • Water Heaters 8,000 W, Amps.
  • Water Heaters 33 A, Voltage.
  • Water Heaters 240, Min. Flow Activation 0.3 gpm, Phase.

Rinnai RL75iN Natural GAS Tankless Water Heater

  • Ideal for two- to three-bathroom homes, the RL75i.
  • RL75iN delivers up to 7.5 gallons of hot water per minute (GPM), while saving energy and money. Mount your compact RL75i.

Stiebel Eltron Tempra 24 Plus Electric Tankless Water Heater

  • Tempra tankless electric water heaters must be correctly sized and you should consult the sizing guide to determine the correct model for you

Rinnai RU160eP 160,000 BTU Outdoor Propane Tankless Water Heater

  • 160,000 Btu

Rinnai RSC160EN Super High Efficiency Plus 9 GPM 160,000 BTU Natural GAS Exterior Tankless Water Heater

  • ENERGY STAR Qualified with an Energy Factor of 0.95 / Uniform Energy Factor of 0.93.
  • Thermal bypass valve included – ideal for homes without a dedicated return line.

Rinnai RU160eN Sensei Residential Natural GAS Tankless Water Heater for Outdoor Installation w/ Extended 2 Year Repair Warranty

  • Equipped with Rinnai Circ-Logic – pair with an external pump to reduce wait time for hot water via scheduled or on-demand recirculation.

Ecosmart Eco 11 Electric Tankless Water Heater

  • Provides continuous hot water for ultimate convenience.
  • Patented Self Modulating technology and design.

Rinnai Super High Efficiency Plus 11 GPM Residential 199,000 BTU Natural GAS Interior Tankless Water Heater (3-Pack)

  • Equipped with Rinnai Circ-Logic – pair with an external pump to reduce wait time for hot water via scheduled or on-demand recirculation.

Rinnai Luxury 766156006333 Whole House Tankless Water Heater – Natural Gas – 180,000 BTU

  • Temperature Controlled, Continuous Flow, Gas Hot Water System.
  • Certified for installation in Manufactued (Mobile) homes.
  • Forced combustion / Direct vent.

Rinnai RUR160eP 160,000 BTU Outdoor Propane Tankless Water Heater

  • Endless Hot Water: Enjoy unlimited hot water flow throughout the house; compact, durable, and easy to install; professional installation recommended.
Rinnai RUR199iN 199,000 BTU Indoor Natural GAS Tankless Water Heater
  • Professional installation required; call 84-GO-Rinnai for assistance.
  • ENERGY STAR Qualified with Uniform Energy Factor of .93.
Ecosmart 27 Tankless Electric Water Heater
  • 27kw
Rinnai RU180iN 180,000 BTU Indoor Natural GAS Tankless Water Heater
  • 130,000 Btu
Rinnai RSC160iN Super High Efficiency Plus 9 GPM 160,000 BTU Natural GAS Interior Tankless Water Heater
  • 9 Gpm / 160,000 Btu
Rinnai V94IN Internal Natural GAS Tankless Water Heater
  • Compact design: saves space
  • Never run out of hot water
  • Up to twice the lifespan of most tanks
Stiebel Eltron Tempra 12 Trend Whole House Electric Tankless Water Heater
  • 12
Rheem RTEX-13 Professional Classic Electric Tankless Hot Water Heater
  • 13kw
Rheem Performance 24 KW Self-Modulating 4.6 GPM Electric Tankless Water Heater
  • up to 6 GPMWater-Saver Shower Head
  • 1.5 GPMStandard Shower Head
  • 2.0 GPMStandard Hand Sink
Stiebel Eltron Tempra 24 Plus Tankless Electric Water Heater
  • 24 Plus Tankless
Rheem RTEX-27 208/240 VAC, Commercial/Residential Electric Tankless Water Heater
  • up to 6 GPMWater-Saver Shower Head
  • 1.5 GPMStandard Shower Head
  • 2.0 GPMStandard Hand Sink
Electric Tankless Water Heater,8000W, Size: 2 in RTEX-08
  • Water Heaters 8,000 W, Amps.
  • Water Heaters 33 A, Voltage.
  • Water Heaters 240, Min. Flow Activation 0.3 gpm, Phase.
Rinnai RL75iN Natural GAS Tankless Water Heater
  • Ideal for two- to three-bathroom homes, the RL75i.
  • RL75iN delivers up to 7.5 gallons of hot water per minute (GPM), while saving energy and money. Mount your compact RL75i.
Stiebel Eltron Tempra 24 Plus Electric Tankless Water Heater
  • Tempra tankless electric water heaters must be correctly sized and you should consult the sizing guide to determine the correct model for you
Rinnai RU160eP 160,000 BTU Outdoor Propane Tankless Water Heater
  • 160,000 Btu
Rinnai RSC160EN Super High Efficiency Plus 9 GPM 160,000 BTU Natural GAS Exterior Tankless Water Heater
  • ENERGY STAR Qualified with an Energy Factor of 0.95 / Uniform Energy Factor of 0.93.
  • Thermal bypass valve included – ideal for homes without a dedicated return line.
Rinnai RU160eN Sensei Residential Natural GAS Tankless Water Heater for Outdoor Installation w/ Extended 2 Year Repair Warranty
  • Equipped with Rinnai Circ-Logic – pair with an external pump to reduce wait time for hot water via scheduled or on-demand recirculation.
Ecosmart Eco 11 Electric Tankless Water Heater
  • Provides continuous hot water for ultimate convenience.
  • Patented Self Modulating technology and design.
Rinnai Super High Efficiency Plus 11 GPM Residential 199,000 BTU Natural GAS Interior Tankless Water Heater (3-Pack)
  • Equipped with Rinnai Circ-Logic – pair with an external pump to reduce wait time for hot water via scheduled or on-demand recirculation.
Rinnai Luxury 766156006333 Whole House Tankless Water Heater – Natural Gas – 180,000 BTU
  • Temperature Controlled, Continuous Flow, Gas Hot Water System.
  • Certified for installation in Manufactued (Mobile) homes.
  • Forced combustion / Direct vent.
Rinnai RUR160eP 160,000 BTU Outdoor Propane Tankless Water Heater
  • Endless Hot Water: Enjoy unlimited hot water flow throughout the house; compact, durable, and easy to install; professional installation recommended.

1. Rinnai RUR199iN 199,000 BTU Indoor Natural GAS Tankless Water Heater

Rinnai RUR199iN 199,000 BTU Indoor Natural GAS Tankless Water Heater

  • Professional installation required; call 84-GO-Rinnai for assistance.
  • ENERGY STAR Qualified with Uniform Energy Factor of .93.
  • Save time with hot water whenever and wherever you need it, any size home, even for simultaneous uses at multiple fixtures.
  • Save energy and reduce utility costs by operating only when hot water is needed.

Check Latest Price

Sold By Price
Amazon.com – Seller
ACWholesalers.com
Supply Online
WWCSupply.com

Product Details

Specifications

Details
Fuel Type Liquid Propane (LP)
Fuel Type Natural Gas (NG)

2. Ecosmart 27 Tankless Electric Water Heater

Ecosmart 27 Tankless Electric Water Heater

  • 27kw

Check Latest Price

Sold By Price
Amazon.com
eBay
Walmart
Ace Hardware

Product Details

Specifications

Details
Assembled Depth (in) 3.75 in
Assembled Height (in) 18 in
Assembled Width (in) 17 in
Assembled Weight (lbs) 13.75 lbs
Item is Shipped at this Packaging Level Y

Reviews From Real Customers

unskilled home owner

3. Rinnai RU180iN 180,000 BTU Indoor Natural GAS Tankless Water Heater

Rinnai RU180iN 180,000 BTU Indoor Natural GAS Tankless Water Heater

  • 130,000 Btu

Check Latest Price

Sold By Price
Amazon.com – Seller
Home Depot
Lowe’s
Vevano

Product Details

Specifications

Details
Fuel Type Liquid Propane (LP)
Fuel Type Natural Gas (NG)

4. Rinnai RSC160iN Super High Efficiency Plus 9 GPM 160,000 BTU Natural GAS Interior Tankless Water Heater

Rinnai RSC160iN Super High Efficiency Plus 9 GPM 160,000 BTU Natural GAS Interior Tankless Water Heater

  • 9 Gpm / 160,000 Btu

Check Latest Price

Sold By Price
Amazon.com – Seller
Home Depot
Vevano
Big Frog Supply

Product Details

Specifications

Details
Product Sub-line Super High Efficiency Plus (SE+)
Fuel Type Natural Gas
Combustion Type Condensing
Vent Type Direct Vent
Venting Category IV

5. Rinnai V94IN Internal Natural GAS Tankless Water Heater

Rinnai V94IN Internal Natural GAS Tankless Water Heater

  • Compact design: saves space
  • Never run out of hot water
  • Up to twice the lifespan of most tanks

Check Latest Price

Sold By Price
Amazon.com
eBay
Lowe’s
Home Depot

Product Details

Specifications

Details
Weight 57.45 oz

6. Stiebel Eltron Tempra 12 Trend Whole House Electric Tankless Water Heater

Stiebel Eltron Tempra 12 Trend Whole House Electric Tankless Water Heater

  • 12

Check Latest Price

Sold By Price
Amazon.com
Lowe’s
WebstaurantStore.com
Global Industrial

Product Details

Specifications

Details
Temperature (Minimum) 68° F
Temperature (Maximum) 140° F
Vent Type Vent Free
Amperage 50A
Voltage 240V

Reviews From Real Customers

Matt M
Key west FL
BandM

7. Rheem RTEX-13 Professional Classic Electric Tankless Hot Water Heater

Rheem RTEX-13 Professional Classic Electric Tankless Hot Water Heater

  • 13kw

Check Latest Price

Sold By Price
Amazon
Wholesale Water Heaters & More
Miami Water Heater
Sears – Ami Ventures Inc

Product Details

Specifications

Details
Water Heater Design Whole House
Water Heater Application General Purpose
Commercial / Residential Commercial/Residential
Watts – Water Heaters 13,000 W
Amps – Water Heaters 54 A

8. Rheem Performance 24 KW Self-Modulating 4.6 GPM Electric Tankless Water Heater

Rheem Performance 24 KW Self-Modulating 4.6 GPM Electric Tankless Water Heater

  • up to 6 GPMWater-Saver Shower Head
  • 1.5 GPMStandard Shower Head
  • 2.0 GPMStandard Hand Sink
  • 0.5 GPMKitchen Sink
  • 1 to 2 GPMBath Tub

Check Latest Price

Sold By Price
Amazon
eBay – homedealss
Home Depot

Product Details

Specifications

Details
Amperage (amps) 100 A
Application Type Residential
Electricity Phase Single Phase
Finish Family Gray
Flow Rate @ 35°F Rise (gallons/min) 4.68 gal (US)/min

9. Stiebel Eltron Tempra 24 Plus Tankless Electric Water Heater

Stiebel Eltron Tempra 24 Plus Tankless Electric Water Heater

  • 24 Plus Tankless

Check Latest Price

Sold By Price
Amazon
SupplyHouse.com
PoshHaus
Wholesale Home

Product Details

Specifications

Details
Temperature (Minimum) 68° F
Temperature (Maximum) 140° F
Vent Type Vent Free
Amperage 100A
Voltage 240V

Reviews From Real Customers

Grumpy

10. Rheem RTEX-27 208/240 VAC, Commercial/Residential Electric Tankless Water Heater

Rheem RTEX-27 208/240 VAC, Commercial/Residential Electric Tankless Water Heater

  • up to 6 GPMWater-Saver Shower Head
  • 1.5 GPMStandard Shower Head
  • 2.0 GPMStandard Hand Sink
  • 0.5 GPMKitchen Sink
  • 1 to 2 GPMBath Tub

Check Latest Price

Sold By Price
Amazon
Rheem Tankless Heaters
Grainger Industrial Supply
AF Supply

Product Details

11. Electric Tankless Water Heater,8000W, Size: 2 in RTEX-08

Electric Tankless Water Heater,8000W, Size: 2 in RTEX-08

  • Water Heaters 8,000 W, Amps.
  • Water Heaters 33 A, Voltage.
  • Water Heaters 240, Min. Flow Activation 0.3 gpm, Phase.
  • Water Heaters 1, Temp. Range.
  • Water Heaters 22 Degrees F

Check Latest Price

Sold By Price
Amazon
Walmart – Aprive Inc

Product Details

12. Rinnai RL75iN Natural GAS Tankless Water Heater

Rinnai RL75iN Natural GAS Tankless Water Heater

  • Ideal for two- to three-bathroom homes, the RL75i.
  • RL75iN delivers up to 7.5 gallons of hot water per minute (GPM), while saving energy and money. Mount your compact RL75i.
  • RL75iN in virtually any room, and vent directly to the outside with a wall or roof penetration.

Check Latest Price

Sold By Price
Amazon
eBay
Big Frog Supply
Morealis

Product Details

Specifications

Details
Weight 65.9 oz

13. Stiebel Eltron Tempra 24 Plus Electric Tankless Water Heater

Stiebel Eltron Tempra 24 Plus Electric Tankless Water Heater

  • Tempra tankless electric water heaters must be correctly sized and you should consult the sizing guide to determine the correct model for you
  • Requires 240 Volt or 208 Volt electric service, and has a maximum output of 28,800 Watts at 240 Volts or 21,600 Watts at 208 Volts
  • Supplies endless hot water at a constant and steady temperature from 68 to 140°F (20-60°C) that can be set on the front panel digital display
  • 99% efficient and typically result in savings of 15-20% in comparison with electric tank water heaters
  • Smart microprocessor technology unique to Tempra water heaters delivers steady water temperature even when flow rate vary as taps are adjusted

Check Latest Price

Sold By Price
Amazon
eBay – mediawaveonline
WebstaurantStore.com
E-Tankless Water Heaters

Product Details

Specifications

Details
Amperage (amps) 100 A
Application Type Residential
Electricity Phase Single Phase
Finish Family Gray
Flow Rate @ 35°F Rise (gallons/min) 4.68 gal (US)/min

14. Rinnai RU160eP 160,000 BTU Outdoor Propane Tankless Water Heater

Rinnai RU160eP 160,000 BTU Outdoor Propane Tankless Water Heater

  • 160,000 Btu

Check Latest Price

Sold By Price
Amazon
Walmart – UnbeatableSale
Home Depot
Vevano

Product Details

Specifications

Details
Fuel Type Liquid Propane (LP)
Fuel Type Natural Gas (NG)

15. Rinnai RSC160EN Super High Efficiency Plus 9 GPM 160,000 BTU Natural GAS Exterior Tankless Water Heater

Rinnai RSC160EN Super High Efficiency Plus 9 GPM 160,000 BTU Natural GAS Exterior Tankless Water Heater

  • ENERGY STAR Qualified with an Energy Factor of 0.95 / Uniform Energy Factor of 0.93.
  • Thermal bypass valve included – ideal for homes without a dedicated return line.
  • Save time with hot water whenever and wherever you need it any size home even for simultaneous uses at multiple fixtures.
  • Save energy and reduce utility costs by operating only when hot water is needed.
  • Maximum output minimum space.

Check Latest Price

Sold By Price
Amazon
Home Depot
Lowe’s
Ferguson

Product Details

Specifications

Details
Gas Type Natural Gas
Number of Showers 1-3
Application Type Residential
Indoor/Outdoor Outdoor
Efficiency Level Super High

16. Rinnai RU160eN Sensei Residential Natural GAS Tankless Water Heater for Outdoor Installation w/ Extended 2 Year Repair Warranty

Rinnai RU160eN Sensei Residential Natural GAS Tankless Water Heater for Outdoor Installation w/ Extended 2 Year Repair Warranty

  • Equipped with Rinnai Circ-Logic – pair with an external pump to reduce wait time for hot water via scheduled or on-demand recirculation.
  • Save time with hot water whenever and wherever you need it, any size home, even for simultaneous uses at multiple fixtures.
  • Save energy and reduce utility costs by operating only when hot water is needed.
  • Temperature lock function prevents accidental or unauthorized changes to water temperature.
  • Complies with South Coast Air Quality Management District 14 ng/J or 20 ppm NOx emission levels.

Check Latest Price

Sold By Price
Amazon
HomePlumbing.com

Product Details

Specifications

Details
Fuel Type Natural Gas
Natural Gas Pressure (Min) 3.5 WC
Natural Gas Pressure (Max) 10.5 WC
Voltage 120v
Frequency 60

17. Ecosmart Eco 11 Electric Tankless Water Heater

Ecosmart Eco 11 Electric Tankless Water Heater

  • Provides continuous hot water for ultimate convenience.
  • Patented Self Modulating technology and design.

Check Latest Price

Sold By Price
Amazon
eBay
Walmart
Ace Hardware

Product Details

Specifications

Details
Assembled Depth (in) 3.75 in
Assembled Height (in) 12 in
Assembled Width (in) 9.75 in
Assembled Weight (lbs) 7 lbs
Item is Shipped at this Packaging Level Y

Reviews From Real Customers

richardtp727
Shane McDoogle
lawraus2014

18. Rinnai Super High Efficiency Plus 11 GPM Residential 199,000 BTU Natural GAS Interior Tankless Water Heater (3-Pack)

Rinnai Super High Efficiency Plus 11 GPM Residential 199,000 BTU Natural GAS Interior Tankless Water Heater (3-Pack)

  • Equipped with Rinnai Circ-Logic – pair with an external pump to reduce wait time for hot water via scheduled or on-demand recirculation.
  • Save time with hot water whenever and wherever you need it, any size home, even for simultaneous uses at multiple fixtures.
  • Save energy and reduce utility costs by operating only when hot water is needed.
  • Temperature lock function prevents accidental or unauthorized changes to water temperature.
  • Complies with South Coast Air Quality Management District 14 ng/J or 20 ppm NOx emission levels.

Check Latest Price

Sold By Price
Amazon
Home Depot

Product Details

Specifications

Details
Application Type Residential
Efficiency Level Super High
Finish Family Silver Metallic
Flow Rate @ 35°F Rise (gallons/min) 9.8 gal (US)/min
Flow Rate @ 45°F Rise (gallons/min) 8.5 gal (US)/min

19. Rinnai Luxury 766156006333 Whole House Tankless Water Heater – Natural Gas – 180,000 BTU

Rinnai Luxury 766156006333 Whole House Tankless Water Heater - Natural Gas - 180,000 BTU

  • Temperature Controlled, Continuous Flow, Gas Hot Water System.
  • Certified for installation in Manufactued (Mobile) homes.
  • Forced combustion / Direct vent.
  • Energy Star Qualified.

Check Latest Price

Sold By Price
Lowe’s
Home Depot
SupplyHouse.com
Vevano

Product Details

Specifications

Details
Fuel Type Liquid Propane (LP)
Fuel Type Natural Gas (NG)

20. Rinnai RUR160eP 160,000 BTU Outdoor Propane Tankless Water Heater

Rinnai RUR160eP 160,000 BTU Outdoor Propane Tankless Water Heater

  • Endless Hot Water: Enjoy unlimited hot water flow throughout the house; compact, durable, and easy to install; professional installation recommended.
  • Energy and Space Efficient: Space-saving design conserves energy as it heats only when necessary.
  • Optimal Water Pressure: Up to 9 GPM hot water flow rate for a powerful, constant stream.
  • Guaranteed to Last: 15-, 5-, and 1-year residential for heat exchanger, labor, and parts, respectively. Wifi monitoring.

Check Latest Price

Sold By Price
MyTanklessWaterHeaterStore
The Trade Table

Product Details

Specifications

Details
Fuel Type Liquid Propane (LP)
Fuel Type Natural Gas (NG)

Conclusion

The tankless water heater for well water is an excellent choice for those who want to have a well-functioning and energy-saving water heater in their home. This type of water heater can save you a lot of money on your energy bills, and it will also help you to conserve water.

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