20 Best Non Condensing Tankless Water Heater (2023 Updated)

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A non condensing tankless water heater is a type of water heater that does not have a tank. Tankless water heaters are more efficient than traditional water heaters because they heat water on demand and do not store hot water in a tank.

Non condensing tankless water heaters are less efficient than condensing tankless water heaters because they do not capture the heat from the exhaust gases and use it to heat the water.

20 Best Non Condensing Tankless Water Heater

Product Image Product Name Features Price

Rinnai Value 6.6 GPM Liquid Propane Tankless Water Heater – White

  • 6.5 Gpm / 150,000 Btu

Rinnai RL94iP Indoor Tankless Water Heater Propane

  • ENERGY STAR qualified.
  • Energy factor of.
  • Built-in Rinnai Circ-LogicTM recirculation program cycles an external pump at pre-set intervals and temperatures to maximize efficiency and comfort.

Rinnai V65IP 6.5 GPM Indoor Propane Tankless Water Heater

  • 6.5 Gpm

Rinnai V75IN 7.5 GPM Indoor Natural GAS Tankless Water Heater

  • Endless Hot Water: Enjoy unlimited hot water flow throughout the house; compact, durable, and easy to install; professional installation recommended

Rinnai RU130iN 130,000 BTU Indoor Natural GAS Tankless Water Heater

  • 130,000 Btu

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.

Rinnai RU130eN 130,000 BTU Outdoor Natural GAS Tankless Water Heater

  • 130,000 Btu

Rinnai RUCS65IN 6.5 GPM Indoor Natural GAS Tankless Water Heater

  • Endless Hot Water: Enjoy unlimited hot water flow throughout the house; compact, durable, and easy to install; professional installation recommended

Rinnai RL94eN Outdoor Natural GAS Tankless Water Heater

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

Takagi TK-510C-NI Non-Condensing Indoor Tankless Water Heater

  • 15-Year limited heat exchanger, 5 yrs limited parts residential use
  • 10-Year limited heat exchanger, 5 yrs limited parts commercial use

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.

Rinnai RUC80IN Ultra Tankless Water Heater Natural GAS

  • Concentric or PVC venting option
  • Up to .96 Energy Factor
  • The space-saving design allows installation almost anywhere

Rinnai RUR98eN Ultra Tankless Water Heater

  • Professional installation required; call 84-GO-Rinnai for assistance
  • ENERGY STAR Qualified with an Energy Factor of 0.95
  • Save time with hot water whenever and wherever you need it, any size home, even for simultaneous uses at multiple fixtures

Rinnai RUCS75iN 7.5 GPM Indoor Natural GAS Tankless Water Heater

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

Rheem RTG-70XLN-1 Outdoor Natural GAS Tankless Water Heater

  • Outdoor 9.5 Gpm / 7.0 Gpm

Takagi TK-110U Indoor/Outdoor NG/LP UltraLow NOx Tankless Water Heater

  • 140

AO Smith ATO-110U-N 6.6 GPM Residential/Commercial Ultra Low-NOx Non-Condensing Natural GAS Outdoor Tankless Water Heater with

  • Never run out of hot water again with a steady 6.6 GPM flow rate
  • Conveniently mounts to your wall for a low profile installation

Rinnai RUR98IP Ultra Tankless Water Heater

  • Overview for Rinnai RUR98IP.
  • Product Features.
  • Compact design saves space.
Rinnai Value 6.6 GPM Liquid Propane Tankless Water Heater – White
  • 6.5 Gpm / 150,000 Btu
Rinnai RL94iP Indoor Tankless Water Heater Propane
  • ENERGY STAR qualified.
  • Energy factor of.
  • Built-in Rinnai Circ-LogicTM recirculation program cycles an external pump at pre-set intervals and temperatures to maximize efficiency and comfort.
Rinnai V65IP 6.5 GPM Indoor Propane Tankless Water Heater
  • 6.5 Gpm
Rinnai V75IN 7.5 GPM Indoor Natural GAS Tankless Water Heater
  • Endless Hot Water: Enjoy unlimited hot water flow throughout the house; compact, durable, and easy to install; professional installation recommended
Rinnai RU130iN 130,000 BTU Indoor Natural GAS Tankless Water Heater
  • 130,000 Btu
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.
Rinnai RU130eN 130,000 BTU Outdoor Natural GAS Tankless Water Heater
  • 130,000 Btu
Rinnai RUCS65IN 6.5 GPM Indoor Natural GAS Tankless Water Heater
  • Endless Hot Water: Enjoy unlimited hot water flow throughout the house; compact, durable, and easy to install; professional installation recommended
Rinnai RL94eN Outdoor Natural GAS Tankless Water Heater
  • Temperature Controlled, Continuous Flow, Gas Hot Water System.
  • Certified for installation in Manufactued (Mobile) homes.
  • Forced combustion / Direct vent.
Takagi TK-510C-NI Non-Condensing Indoor Tankless Water Heater
  • 15-Year limited heat exchanger, 5 yrs limited parts residential use
  • 10-Year limited heat exchanger, 5 yrs limited parts commercial use
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.
Rinnai RUC80IN Ultra Tankless Water Heater Natural GAS
  • Concentric or PVC venting option
  • Up to .96 Energy Factor
  • The space-saving design allows installation almost anywhere
Rinnai RUR98eN Ultra Tankless Water Heater
  • Professional installation required; call 84-GO-Rinnai for assistance
  • ENERGY STAR Qualified with an Energy Factor of 0.95
  • Save time with hot water whenever and wherever you need it, any size home, even for simultaneous uses at multiple fixtures
Rinnai RUCS75iN 7.5 GPM Indoor Natural GAS Tankless Water Heater
  • Compact design: saves space
  • Never run out of hot water
  • Up to twice the lifespan of most tanks
Rheem RTG-70XLN-1 Outdoor Natural GAS Tankless Water Heater
  • Outdoor 9.5 Gpm / 7.0 Gpm
Takagi TK-110U Indoor/Outdoor NG/LP UltraLow NOx Tankless Water Heater
  • 140
AO Smith ATO-110U-N 6.6 GPM Residential/Commercial Ultra Low-NOx Non-Condensing Natural GAS Outdoor Tankless Water Heater with
  • Never run out of hot water again with a steady 6.6 GPM flow rate
  • Conveniently mounts to your wall for a low profile installation
Rinnai RUR98IP Ultra Tankless Water Heater
  • Overview for Rinnai RUR98IP.
  • Product Features.
  • Compact design saves space.

1. Rinnai Value 6.6 GPM Liquid Propane Tankless Water Heater – White

Rinnai Value 6.6 GPM Liquid Propane Tankless Water Heater - White

  • 6.5 Gpm / 150,000 Btu

Check Latest Price

Sold By Price
Amazon.com
Home Depot
Build.com
Big Frog Supply

Product Details

Specifications

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

Reviews From Real Customers

Steve C
Greg Heyborne
Dexter & Tonya Scott

2. Rinnai RL94iP Indoor Tankless Water Heater Propane

Rinnai RL94iP Indoor Tankless Water Heater Propane

  • ENERGY STAR qualified.
  • Energy factor of.
  • Built-in Rinnai Circ-LogicTM recirculation program cycles an external pump at pre-set intervals and temperatures to maximize efficiency and comfort.

Check Latest Price

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

Product Details

Specifications

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

Reviews From Real Customers

alf24328
birdoger
ter28222

3. Rinnai V65IP 6.5 GPM Indoor Propane Tankless Water Heater

Rinnai V65IP 6.5 GPM Indoor Propane Tankless Water Heater

  • 6.5 Gpm

Check Latest Price

Sold By Price
Amazon.com – Seller
Home Depot
SupplyHouse.com
Ferguson

Product Details

Specifications

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

Reviews From Real Customers

arvidpodsim
BeckyH7125
TNEinTexas2442

4. Rinnai V75IN 7.5 GPM Indoor Natural GAS Tankless Water Heater

Rinnai V75IN 7.5 GPM Indoor Natural GAS 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: High-performance up to 7.5 GPM hot water flow rate for a powerful, constant stream
  • Enhanced scale detection lessens possibility of serious, long-term damage to unit

Check Latest Price

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

Product Details

Specifications

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

Reviews From Real Customers

paris2932
Boz
Atlanta Homeowner

5. Rinnai RU130iN 130,000 BTU Indoor Natural GAS Tankless Water Heater

Rinnai RU130iN 130,000 BTU Indoor Natural GAS Tankless Water Heater

  • 130,000 Btu

Check Latest Price

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

Product Details

Specifications

Details
Weight 79.75 oz

Reviews From Real Customers

Bmac
Notsohot1769
Bmac9572

6. 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)

Reviews From Real Customers

ZoidinNH9054
juicex2438

7. Rinnai RU130eN 130,000 BTU Outdoor Natural GAS Tankless Water Heater

Rinnai RU130eN 130,000 BTU Outdoor Natural GAS Tankless Water Heater

  • 130,000 Btu

Check Latest Price

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

Product Details

Specifications

Details
Weight 78.1 oz

8. Rinnai RUCS65IN 6.5 GPM Indoor Natural GAS Tankless Water Heater

Rinnai RUCS65IN 6.5 GPM Indoor Natural GAS 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: High-performance 6.5 GPM hot water flow rate for a powerful, constant stream
  • Multiple venting options available including PVC/CPVC using the Ubbink Concentric to Twin Pipe adaptor allow for an easy installation

Check Latest Price

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

Product Details

Specifications

Details
Weight 55 oz

Reviews From Real Customers

Kirk
Matt
putinbaytr3

9. Rinnai RL94eN Outdoor Natural GAS Tankless Water Heater

Rinnai RL94eN Outdoor Natural GAS Tankless Water Heater

  • 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
Amazon
eBay
Home Depot
Lowe’s

Product Details

Specifications

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

Reviews From Real Customers

les22358
eri21552
brobey8920

10. Takagi TK-510C-NI Non-Condensing Indoor Tankless Water Heater

Takagi TK-510C-NI Non-Condensing Indoor Tankless Water Heater

  • 15-Year limited heat exchanger, 5 yrs limited parts residential use
  • 10-Year limited heat exchanger, 5 yrs limited parts commercial use
  • Energy factor of 0.82 for natural gas or liquid Propane
  • Convertible from natural gas to liquid Propane
  • Complies with ultra-low NOx regulations of less than 14 ng/j (<20PPM)

Check Latest Price

Sold By Price
Amazon
TanklessKing
PlumbersCrib
PlumbersStock.com

Product Details

Specifications

Details
Product Dimensions 13.75 x 10.5 x 20.5 inches
Is Discontinued By Manufacturer No
Power Source Gas Powered
Voltage 120 Volts
Item Package Quantity 1

Reviews From Real Customers

JEP
Jmcgregor
rocket29

11. 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

Reviews From Real Customers

studynsleep
Curtis Mewborn
rmo18576

12. Rinnai RUC80IN Ultra Tankless Water Heater Natural GAS

Rinnai RUC80IN Ultra Tankless Water Heater Natural GAS

  • Concentric or PVC venting option
  • Up to .96 Energy Factor
  • The space-saving design allows installation almost anywhere
  • Ultra low NOx emissions
  • 152,000 max BTU

Check Latest Price

Sold By Price
Amazon
WWCSupply.com

Product Details

Specifications

Details
Weight 70.55 oz

Reviews From Real Customers

bih29947
kre41572
jho41363

13. Rinnai RUR98eN Ultra Tankless Water Heater

Rinnai RUR98eN Ultra Tankless Water Heater

  • Professional installation required; call 84-GO-Rinnai for assistance
  • ENERGY STAR Qualified with an Energy Factor of 0.95
  • 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, suitable for installation in non-traditional spaces such as crawl spaces and attics

Check Latest Price

Sold By Price
Amazon
MyTanklessWaterHeaterStore

Product Details

Specifications

Details
Voltage 120 Volts
Overall Dimensions (L x W x H) 12.5 x 10 x 26 inches
Flow Rate 9.8 gpm
Item Weight (lbs) 72.8 Pounds

Reviews From Real Customers

sag40241
mwe40171
dbc39903

14. Rinnai Luxury 7.5 GPM Liquid Propane Tankless Water Heater RL75eP

Rinnai Luxury 7.5 GPM Liquid Propane Tankless Water Heater RL75eP

Check Latest Price

Sold By Price
Amazon
GadgetsGo

Product Details

Reviews From Real Customers

NCretired8248
mtw22638
NotRealHappy6427

15. Rinnai RUCS75iN 7.5 GPM Indoor Natural GAS Tankless Water Heater

Rinnai RUCS75iN 7.5 GPM Indoor 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
eBay
Ferguson
ACWholesalers.com

Product Details

Specifications

Details
Weight 57.3 oz

Reviews From Real Customers

Nokieness3444
LaceyJub8532926
Barbee7359

16. Rheem RTG-70XLN-1 Outdoor Natural GAS Tankless Water Heater

Rheem RTG-70XLN-1 Outdoor Natural GAS Tankless Water Heater

  • Outdoor 9.5 Gpm / 7.0 Gpm

Check Latest Price

Sold By Price
Amazon
Rheem Tankless Heaters
Wayfair
Big Frog Supply

Product Details

Specifications

Details
Fuel Type Natural Gas
Water Connection 3/4″
Voltage 120V
Amperage 2A
Activation GPM 0.4

17. Takagi TK-110U Indoor/Outdoor NG/LP UltraLow NOx Tankless Water Heater

Takagi TK-110U Indoor/Outdoor NG/LP UltraLow NOx Tankless Water Heater

  • 140

Check Latest Price

Sold By Price
eBay
Walmart – Buildcom
SupplyHouse.com
TanklessKing

Product Details

Specifications

Details
Capacity 1 to 2 Bathrooms
Application Residential
Installation Type Indoor Only
Fuel Type Propane
Energy Factor 0.82

Reviews From Real Customers

Steve M
Rob

18. Takagi TK-310C-NI Natural GAS Tankless Water Heater 190K BTU – Non-Condensing

Takagi TK-310C-NI Natural GAS Tankless Water Heater 190K BTU - Non-Condensing

Check Latest Price

Sold By Price
PlumbersStock.com

Product Details

Specifications

Details
Water Heater Type Tankless
Modus Operandi Natural Gas
Power Corded
Electrical Voltage 120 VAC
Connection Size 3/4″

19. AO Smith ATO-110U-N 6.6 GPM Residential/Commercial Ultra Low-NOx Non-Condensing Natural GAS Outdoor Tankless Water Heater with

AO Smith ATO-110U-N 6.6 GPM Residential/Commercial Ultra Low-NOx Non-Condensing Natural GAS Outdoor Tankless Water Heater with

  • Never run out of hot water again with a steady 6.6 GPM flow rate
  • Conveniently mounts to your wall for a low profile installation
  • Comes packaged with a remote control for simple operation

Check Latest Price

Sold By Price
ACWholesalers.com
eComfort.com

Product Details

Specifications

Details
Heat Exchanger Material Copper
Fuel Type Natural Gas
Combustion Type Non-Condensing
Vent Type Outdoor (No Venting)
Storage Type Tankless

Reviews From Real Customers

Klyn
Little Bert
Larry P

20. Rinnai RUR98IP Ultra Tankless Water Heater

Rinnai RUR98IP Ultra Tankless Water Heater

  • Overview for Rinnai RUR98IP.
  • Product Features.
  • Compact design saves space.
  • Energy-efficient promise that saves you money.
  • Continuous Water for Multiple Applications.

Check Latest Price

Sold By Price
Zoro

Product Details

Specifications

Details
Gas Connection 3/4″
Liquid Propane Pressure (Max) 13.5 WC
Liquid Propane Pressure (Min) 8.0 WC
Maximum Flow Rate 9.8 GPM
Vent Maximum Run 492 in.

Reviews From Real Customers

sch42232
gar41070

Conclusion

A tankless water heater is a great option for those who want an efficient and space-saving way to heat their water. However, it is important to remember that a tankless water heater is not right for everyone.

If you have a large family or a high demand for hot water, a tankless water heater may not be able to keep up with your needs. Additionally, tankless water heaters require regular maintenance in order to keep them running smoothly.

If you are not comfortable with performing regular maintenance on your water heater, a tankless model may not be the best option for you.

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