Best Tankless Water Heaters Updated April 2025

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Best Tankless Water Heaters
2025 Buyer's GuideUpdated April 2025
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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...
Water heating capacity
Ease of installation
Design
Functionality
Quietness
Energy efficiency
Picked by 761 people this week!
Picked by 761 people this week!

9.9

1
NEW Rinnai RX199iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater, Indoor or Outdoor Water Heater, Up to 1...
Water heating capacity
Ease of installation
Design
Functionality
Quietness
Energy efficiency

9.7

2

9.7

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

9.7

2
Rheem RTEX-24 24kW 240V Electric Tankless Water Heater, Gray
Functionality
Ease of installation
Value for money
Water supply
Compactness

9.5

3

9.5

Propane Gas Tankless Water Heater, MIZUDO Up to 3.6 GPM, 80,000 BTU, CSA Certified, Indoor Installation Instant Hot Water Heate...
Functionality
Ease of installation
Value for money
Build quality
Shower capacity

9.5

3
Propane Gas Tankless Water Heater, MIZUDO Up to 3.6 GPM, 80,000 BTU, CSA Certified, Indoor Installation Instant Hot Water Heate...
Functionality
Ease of installation
Value for money
Build quality
Shower capacity

9.3

4

9.3

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

9.3

4
Rheem 18kW 240V Tankless Electric Water Heater, Gray
Ease of installation
Value for money
Space saving
Build quality

9.2

5

9.2

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

9.2

5
BOSCH Electric Mini-Tank Water Heater Tronic 3000 T 4-Gallon (ES4) - Eliminate Time for Hot Water - Shelf, Wall or Floor Mounte...
Heat transfer
Works well
Ease of installation
Size
Value for money
Installation

9.0

6

9.0

Rheem 240V Heating Chamber RTEX-13 Residential Tankless Water Heater, GRAY
Works well
Ease of installation
Value for money
Space saving
Shower capacity

9.0

6
Rheem 240V Heating Chamber RTEX-13 Residential Tankless Water Heater, GRAY
Works well
Ease of installation
Value for money
Space saving
Shower capacity

8.8

7

8.8

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 transfer
Works well
Ease of installation
Size
Value for money
Installation

8.8

7
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 transfer
Works well
Ease of installation
Size
Value for money
Installation

8.6

8

8.6

Titan Electric Tankless Water Heater
Functionality
Ease of installation
Value for money
Ease of replacement
Space saving
Energy efficiency

8.6

8
Titan Electric Tankless Water Heater
Functionality
Ease of installation
Value for money
Ease of replacement
Space saving
Energy efficiency

8.5

9

8.5

EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating Technology
Works well
Ease of installation
Size
Value for money
Water heater

8.5

9
EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating Technology
Works well
Ease of installation
Size
Value for money
Water heater

8.0

10

8.0

CAMPLUX Tankless Water Heater Outdoor, 1.32 GPM Portable Propane Camping Water Heater, 5L, AY132, White
Works great
Water temperature
Ease of installation
Value for money
Shower quality

8.0

10
CAMPLUX Tankless Water Heater Outdoor, 1.32 GPM Portable Propane Camping Water Heater, 5L, AY132, White
Works great
Water temperature
Ease of installation
Value for money
Shower quality

Our Top Choice

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...
Water heating capacity
Ease of installation
Design
Functionality
Quietness
Energy efficiency
Picked by 761 people this week!
Picked by 761 people this week!

9.9

1
NEW Rinnai RX199iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater, Indoor or Outdoor Water Heater, Up to 1...
Water heating capacity
Ease of installation
Design
Functionality
Quietness
Energy efficiency