Best LP On Demand Water Heaters Updated May 2025
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Best LP On Demand Water Heaters
2025 Buyer's GuideUpdated May 2025
Advertiser disclosure About our rankings
Sort by:
Best Overall

9.9

1

9.9

Ranein Propane Gas Tankless Water Heater, Indoor Max 3.6 GPM, 80,000 BTU Instant Hot Water Heater
Works great
Water temperature
Ease of installation
Value for money
Space saving
Energy efficiency
Best Overall

9.9

1
Ranein Propane Gas Tankless Water Heater, Indoor Max 3.6 GPM, 80,000 BTU Instant Hot Water Heater
Works great
Water temperature
Ease of installation
Value for money
Space saving
Energy efficiency

9.8

2

9.8

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

9.8

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
Premium Pick

9.7

3

9.7

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
Premium Pick

9.7

3
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
Popular

9.6

4

9.6

BOSCH Electric Mini-Tank Water Heater Tronic 3000 T 4-Gallon (ES4) - Eliminate Time for Hot Water - Shelf, Wall or Floor Mounte...
Heat level
Works great
Ease of installation
Size
Value for money
Installation
Save 6%
Save 6%
Popular

9.6

4
BOSCH Electric Mini-Tank Water Heater Tronic 3000 T 4-Gallon (ES4) - Eliminate Time for Hot Water - Shelf, Wall or Floor Mounte...
Heat level
Works great
Ease of installation
Size
Value for money
Installation
Save 6%

9.4

5

9.4

Rheem 18kW 240V Tankless Electric Water Heater, Gray
Ease of installation
Value for money
Space saving
Build quality

9.4

5
Rheem 18kW 240V Tankless Electric Water Heater, Gray
Ease of installation
Value for money
Space saving
Build quality

9.3

6

9.3

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

9.3

6
ThermoMate 102,000 BTU 4.7 GPM Propane Tankless Water Heater - High Efficiency Instant Hot Water for Whole House Use, Indoor Re...

9.2

7

9.2

RV Tankless Water Heater Propane Gas, RVPart Pro, with 15"x15" White Door and Remote Controller, DC 12V, 7×24 Technical Support...
Functionality
Ease of installation
Value for money

9.2

7
RV Tankless Water Heater Propane Gas, RVPart Pro, with 15"x15" White Door and Remote Controller, DC 12V, 7×24 Technical Support...
Functionality
Ease of installation
Value for money

9.0

8

9.0

Propane Gas Tankless Water Heater MIZUDO Up to 5.1 GPM, 120,000 BTU, Outdoor Installation Only, Instant Hot Water Heater, CSA C...
Functionality
Ease of installation
Value for money
Water capacity

9.0

8
Propane Gas Tankless Water Heater MIZUDO Up to 5.1 GPM, 120,000 BTU, Outdoor Installation Only, Instant Hot Water Heater, CSA C...
Functionality
Ease of installation
Value for money
Water capacity
Best Value

8.9

9

8.9

Portable Water Heater Propane Tankless - 6L 1.58GPM RV on demand Hot Gas Outdoor Digital Display Water Heater for Camping,Boat,...
Functionality
Ease of setup
Camping use
Save 15%
Save 15%
Best Value

8.9

9
Portable Water Heater Propane Tankless - 6L 1.58GPM RV on demand Hot Gas Outdoor Digital Display Water Heater for Camping,Boat,...
Functionality
Ease of setup
Camping use
Save 15%

7.9

10

7.9

CAMPLUX Climatech 7 Tankless Water Heater Propane Indoor 102000 BTU, 4.22 GPM On Demand Instant Tankless Hot Propane Water Heat...
Works well
Ease of installation
Look
Space
Water heater quality
Save 30% + $50 Coupon
Save 30% + $50 Coupon

7.9

10
CAMPLUX Climatech 7 Tankless Water Heater Propane Indoor 102000 BTU, 4.22 GPM On Demand Instant Tankless Hot Propane Water Heat...
Works well
Ease of installation
Look
Space
Water heater quality
Save 30% + $50 Coupon

Our Top Choice

Best Overall

9.9

1

9.9

Ranein Propane Gas Tankless Water Heater, Indoor Max 3.6 GPM, 80,000 BTU Instant Hot Water Heater
Works great
Water temperature
Ease of installation
Value for money
Space saving
Energy efficiency
Best Overall

9.9

1
Ranein Propane Gas Tankless Water Heater, Indoor Max 3.6 GPM, 80,000 BTU Instant Hot Water Heater
Works great
Water temperature
Ease of installation
Value for money
Space saving
Energy efficiency
Related Categories
LP Tankless Water HeaterOutdoor Tankless Hot Water HeaterGas Water HeaterIndoor On-Demand Propane Water HeaterTankless Water Heater (All)Tankless Hot Water Heater
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Related Categories
LP Tankless Water HeaterOutdoor Tankless Hot Water HeaterGas Water HeaterIndoor On-Demand Propane Water HeaterTankless Water Heater (All)Tankless Hot Water Heater
Related Categories
LP Tankless Water HeaterOutdoor Tankless Hot Water HeaterGas Water HeaterIndoor On-Demand Propane Water HeaterTankless Water Heater (All)Tankless Hot Water Heater