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

9.8

1

9.8

GASLAND BE158 Propane Tankless Water Heater 6L, Outdoor Portable Hot Water Heater, Overheating Protection, Easy to Install, Use...
Functionality
Ease of installation
Outdoor shower
Temperature control
Picked by 312 people this month!
Picked by 312 people this month!
Picked by 312 people this month!
Best On-Demand Water Heater

9.8

1
GASLAND BE158 Propane Tankless Water Heater 6L, Outdoor Portable Hot Water Heater, Overheating Protection, Easy to Install, Use...
Functionality
Ease of installation
Outdoor shower
Temperature control
Picked by 312 people this month!

9.7

2

9.7

Ranein Natural 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

9.7

2
Ranein Natural 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

9.6

3

9.6

Ranein Electric Tankless Water Heater, 18kW 240V on Demand Instant Endless Water Heater with LED Temperature Display for Reside...
Water temperature
Functionality
Ease of installation
Quality
Space saving
Value for money
Save 11%
Save 11%

9.6

3
Ranein Electric Tankless Water Heater, 18kW 240V on Demand Instant Endless Water Heater with LED Temperature Display for Reside...
Water temperature
Functionality
Ease of installation
Quality
Space saving
Value for money
Save 11%
Popular

9.4

4

9.4

BOSCH Electric Mini-Tank Water Heater Tronic 3000 T 2.5-Gallon (ES2.5) - Eliminate Time for Hot Water - Shelf, Wall or Floor Mo...
Heat level
Works great
Ease of installation
Size
Value for money
Installation
Save 15%
Save 15%
Popular

9.4

4
BOSCH Electric Mini-Tank Water Heater Tronic 3000 T 2.5-Gallon (ES2.5) - Eliminate Time for Hot Water - Shelf, Wall or Floor Mo...
Heat level
Works great
Ease of installation
Size
Value for money
Installation
Save 15%

9.3

5

9.3

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

9.3

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

9.2

6

9.2

CAMPLUX Tankless Water Heater Outdoor, 1.32 GPM Portable Propane Camping Water Heater, 5L, AY132, White
Works great
Water temperature
Ease of setup
Value for money
Shower size
Read Full Review

9.2

6
CAMPLUX Tankless Water Heater Outdoor, 1.32 GPM Portable Propane Camping Water Heater, 5L, AY132, White
Works great
Water temperature
Ease of setup
Value for money
Shower size
Read Full Review

9.1

7

9.1

14kW Tankless Water Heater Electric, ORBEK 240 Volt On Demand Instant Hot Water Heater, with LED Digital Display, ETL Certified...
Ease of installation
Functionality
Quality

9.1

7
14kW Tankless Water Heater Electric, ORBEK 240 Volt On Demand Instant Hot Water Heater, with LED Digital Display, ETL Certified...
Ease of installation
Functionality
Quality
Best Value

8.9

8

8.9

Generic Tankless Water Heater Electric, Instant Hot Water Heater Under Sink, 3000W 110V On Demand Mini Water Heater for RV Kitc...
Ease of installation
Space saving
Save 13%
Save 13%
Best Value

8.9

8
Generic Tankless Water Heater Electric, Instant Hot Water Heater Under Sink, 3000W 110V On Demand Mini Water Heater for RV Kitc...
Ease of installation
Space saving
Save 13%

8.8

9

8.8

GE Appliances 10 Gallon Versatile Plug and Play Electric Water Heater with Adjustable Thermostat, Easily Installs Where You Wan...
Functionality
Ease of installation
Quality
Value for money
Size

8.8

9
GE Appliances 10 Gallon Versatile Plug and Play Electric Water Heater with Adjustable Thermostat, Easily Installs Where You Wan...
Functionality
Ease of installation
Quality
Value for money
Size
Premium Pick

8.4

10

8.4

Rheem RTEX-24 24kW 240V Electric Tankless Water Heater, Gray
Ease of installation
Water supply
Value for money
Size
Quality
Premium Pick

8.4

10
Rheem RTEX-24 24kW 240V Electric Tankless Water Heater, Gray
Ease of installation
Water supply
Value for money
Size
Quality

Our Top Choice

Best On-Demand Water Heater

9.8

1

9.8

GASLAND BE158 Propane Tankless Water Heater 6L, Outdoor Portable Hot Water Heater, Overheating Protection, Easy to Install, Use...
Functionality
Ease of installation
Outdoor shower
Temperature control
Picked by 312 people this month!
Picked by 312 people this month!
Picked by 312 people this month!
Best On-Demand Water Heater

9.8

1
GASLAND BE158 Propane Tankless Water Heater 6L, Outdoor Portable Hot Water Heater, Overheating Protection, Easy to Install, Use...
Functionality
Ease of installation
Outdoor shower
Temperature control
Picked by 312 people this month!
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