Best Indoor On-Demand Propane Water Heaters Updated May 2025
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Best Indoor On-Demand Propane Water Heaters
2025 Buyer's GuideUpdated May 2025
Advertiser disclosure About our rankings
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Best Overall

9.9

1

9.9

NEW Rinnai RX199iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater, Indoor or Outdoor Water Heater, Up to 1...
Ease of installation
Heat capacity
Water temperature
Design
Works great
Energy efficiency
Picked by 267 people this week!
Picked by 267 people this week!
Picked by 267 people this week!
Best Overall

9.9

1
NEW Rinnai RX199iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater, Indoor or Outdoor Water Heater, Up to 1...
Ease of installation
Heat capacity
Water temperature
Design
Works great
Energy efficiency
Picked by 267 people this week!

9.5

2

9.5

forimo Tankless Water Heater Propane, 4.74GPM 18L Indoor,Instant Hot Propane Gas Water Heater,Constant Propane Water Heater wit...
Value for money
Ease of installation
Build quality

9.5

2
forimo Tankless Water Heater Propane, 4.74GPM 18L Indoor,Instant Hot Propane Gas Water Heater,Constant Propane Water Heater wit...
Value for money
Ease of installation
Build quality

9.2

3

9.2

CAMPLUX Climatech 7 Tankless Water Heater Propane Indoor 102000 BTU, 4.22 GPM On Demand Instant Tankless Hot Propane Water Heat...
Look
Space
Water heater quality
Heat level
Brand
Save 30%
Save 30%

9.2

3
CAMPLUX Climatech 7 Tankless Water Heater Propane Indoor 102000 BTU, 4.22 GPM On Demand Instant Tankless Hot Propane Water Heat...
Look
Space
Water heater quality
Heat level
Brand
Save 30%
Popular

9.0

4

9.0

Ranein Propane Gas Tankless Water Heater with Vent Pipe, Indoor Max 4.3 GPM, 100,000 BTU Instant Hot Water Heater
Works great
Water temperature
Ease of installation
Value for money
Space saving
Energy efficiency
Popular

9.0

4
Ranein Propane Gas Tankless Water Heater with Vent Pipe, Indoor Max 4.3 GPM, 100,000 BTU Instant Hot Water Heater
Works great
Water temperature
Ease of installation
Value for money
Space saving
Energy efficiency

8.9

5

8.9

ThermoMate 102,000 BTU 4.7 GPM Propane Tankless Water Heater - High Efficiency Instant Hot Water for Whole House Use, Indoor Re...

8.9

5
ThermoMate 102,000 BTU 4.7 GPM Propane Tankless Water Heater - High Efficiency Instant Hot Water for Whole House Use, Indoor Re...

8.8

6

8.8

Rinnai V53DeP Propane Tankless Water Heater, 5.3 GPM, Outdoor Installation
Functionality
Ease of installation
Heat efficiency
Value for money
Space saving

8.8

6
Rinnai V53DeP Propane Tankless Water Heater, 5.3 GPM, Outdoor Installation
Functionality
Ease of installation
Heat efficiency
Value for money
Space saving
Best Value

8.7

7

8.7

forimo Tankless Water Heater Propane, 4.21GPM 16L Indoor,Instant Hot Propane Gas Water Heater,Constant Propane Water Heater wit...
Ease of installation
Value for money
Size
Save 20%
Save 20%
Best Value

8.7

7
forimo Tankless Water Heater Propane, 4.21GPM 16L Indoor,Instant Hot Propane Gas Water Heater,Constant Propane Water Heater wit...
Ease of installation
Value for money
Size
Save 20%

8.6

8

8.6

Propane Gas Tankless Water Heater - ORBEK Indoor Installation 80,000 BTU Up to 3.6 GPM - CSA Certified On-Demand Instant Hot Wa...
Functionality
Ease of installation
Build quality
Value for money
Fuel efficiency

8.6

8
Propane Gas Tankless Water Heater - ORBEK Indoor Installation 80,000 BTU Up to 3.6 GPM - CSA Certified On-Demand Instant Hot Wa...
Functionality
Ease of installation
Build quality
Value for money
Fuel efficiency

8.5

9

8.5

CAMPLUX Climatech 3 Tankless Water Heater Propane, 65,000 BTU Propane On Demand Hot Water Heater, Max 2.64 GPM, Indoor Installa...
Functionality
Ease of installation
Temperature control

8.5

9
CAMPLUX Climatech 3 Tankless Water Heater Propane, 65,000 BTU Propane On Demand Hot Water Heater, Max 2.64 GPM, Indoor Installa...
Functionality
Ease of installation
Temperature control

Our Top Choice

Best Overall

9.9

1

9.9

NEW Rinnai RX199iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater, Indoor or Outdoor Water Heater, Up to 1...
Ease of installation
Heat capacity
Water temperature
Design
Works great
Energy efficiency
Picked by 267 people this week!
Picked by 267 people this week!
Picked by 267 people this week!
Best Overall

9.9

1
NEW Rinnai RX199iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater, Indoor or Outdoor Water Heater, Up to 1...
Ease of installation
Heat capacity
Water temperature
Design
Works great
Energy efficiency
Picked by 267 people this week!
Related Categories
LP On Demand Water HeaterLP Tankless Water HeaterRinnai Tankless Water HeaterTankless Hot Water HeaterOutdoor Tankless Hot Water HeaterOutdoor Tankless Water Heater
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Related Categories
LP On Demand Water HeaterLP Tankless Water HeaterRinnai Tankless Water HeaterTankless Hot Water HeaterOutdoor Tankless Hot Water HeaterOutdoor Tankless Water Heater
Related Categories
LP On Demand Water HeaterLP Tankless Water HeaterRinnai Tankless Water HeaterTankless Hot Water HeaterOutdoor Tankless Hot Water HeaterOutdoor Tankless Water Heater