Best Gas Tankless Water Heaters Updated May 2025
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Best Gas Tankless Water Heaters
2025 Buyer's GuideUpdated May 2025
Advertiser disclosure About our rankings
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Best Water Heater

9.9

1

9.9

Takagi T-H3-DV-N Condensing High Efficiency Natural Gas Indoor Tankless Water Heater, 10-Gallon Per Minute, 199,000 BTU
Functionality
Heat level
Ease of installation
Energy efficiency
Space saving
Build quality
Picked by 165 people this month!
Picked by 165 people this month!
Picked by 165 people this month!
Best Water Heater

9.9

1
Takagi T-H3-DV-N Condensing High Efficiency Natural Gas Indoor Tankless Water Heater, 10-Gallon Per Minute, 199,000 BTU
Functionality
Heat level
Ease of installation
Energy efficiency
Space saving
Build quality
Picked by 165 people this month!
Premium Pick

9.7

2

9.7

Rinnai RU160iN Condensing Tankless Hot Water Heater, 9 GPM, Natural Gas, Indoor Installation
Functionality
Water supply
Ease of installation
Efficiency
Noise level
Space saving
Premium Pick

9.7

2
Rinnai RU160iN Condensing Tankless Hot Water Heater, 9 GPM, Natural Gas, Indoor Installation
Functionality
Water supply
Ease of installation
Efficiency
Noise level
Space saving

9.3

3

9.3

Waterdrop AP431 AP430SS Whole House Scale Inhibitor Filter, Heater Softener System, Prevent Scale Build Up On Hot Water Heaters...
Functionality
Ease of installation
Water filter
Scale reduction
Value for money
$8 Coupon
$8 Coupon

9.3

3
Waterdrop AP431 AP430SS Whole House Scale Inhibitor Filter, Heater Softener System, Prevent Scale Build Up On Hot Water Heaters...
Functionality
Ease of installation
Water filter
Scale reduction
Value for money
$8 Coupon

9.0

4

9.0

Dupray Neat Steam Cleaner with 17-Piece Kit – Powerful, chemical-free cleaning for floors, cars, tiles, grout, and more, offeri...
Cleaning power
Works well
Ease of use
Value for money
Build quality
Attachments

9.0

4
Dupray Neat Steam Cleaner with 17-Piece Kit – Powerful, chemical-free cleaning for floors, cars, tiles, grout, and more, offeri...
Cleaning power
Works well
Ease of use
Value for money
Build quality
Attachments
Popular

8.8

5

8.8

SimPure Whole House Water Filter Housing (DB10P), 10" x 4.5" Sediment Carbon Filter Universal Housing, Pre-Filtration System fo...
Build quality
Ease of installation
Functionality
Filter quality
Value for money
Popular

8.8

5
SimPure Whole House Water Filter Housing (DB10P), 10" x 4.5" Sediment Carbon Filter Universal Housing, Pre-Filtration System fo...
Build quality
Ease of installation
Functionality
Filter quality
Value for money

8.7

6

8.7

SimPure Whole House Water Filter Housing (DB20P), 20" x 4.5" Sediment Carbon Filter Universal Housing, Pre-Filtration System fo...
Build quality
Ease of installation
Functionality
Filter quality
Value for money

8.7

6
SimPure Whole House Water Filter Housing (DB20P), 20" x 4.5" Sediment Carbon Filter Universal Housing, Pre-Filtration System fo...
Build quality
Ease of installation
Functionality
Filter quality
Value for money
Best Value

8.6

7

8.6

Waterdrop Water Filter Pitcher with 1 Filter, 5X Times Lifetime, Lasts 200 Gallons, for Fridge, Countertop and Gift, Reduces PF...
Taste
Filter speed
Functionality
Design
Value for money
Size
Save 21%
Save 21%
Best Value

8.6

7
Waterdrop Water Filter Pitcher with 1 Filter, 5X Times Lifetime, Lasts 200 Gallons, for Fridge, Countertop and Gift, Reduces PF...
Taste
Filter speed
Functionality
Design
Value for money
Size
Save 21%

8.5

8

8.5

Rheem RTG-84XLN-1 Mid-Efficiency 8.4GPM Outdoor Natural Gas Tankless Water Heater, Gray
Functionality
Ease of installation
Value for money

8.5

8
Rheem RTG-84XLN-1 Mid-Efficiency 8.4GPM Outdoor Natural Gas Tankless Water Heater, Gray
Functionality
Ease of installation
Value for money

8.3

9

8.3

CAMPLUX Tankless Water Heater Natural Gas, 3.18 GPM Instant Hot Water Heater Indoor, 82,000 BTU On-Demand Gas Tankless Water He...
Works well
Ease of installation
Look
Space
Water heater quality

8.3

9
CAMPLUX Tankless Water Heater Natural Gas, 3.18 GPM Instant Hot Water Heater Indoor, 82,000 BTU On-Demand Gas Tankless Water He...
Works well
Ease of installation
Look
Space
Water heater quality

8.0

10

8.0

CAMPLUX Natural Gas Water Heater Indoor, Tankless Water Heater, 2.64 GPM On Deamnd Hot Water, Whole House, White
Efficiency
Savings

8.0

10
CAMPLUX Natural Gas Water Heater Indoor, Tankless Water Heater, 2.64 GPM On Deamnd Hot Water, Whole House, White
Efficiency
Savings

Our Top Choice

Best Water Heater

9.9

1

9.9

Takagi T-H3-DV-N Condensing High Efficiency Natural Gas Indoor Tankless Water Heater, 10-Gallon Per Minute, 199,000 BTU
Functionality
Heat level
Ease of installation
Energy efficiency
Space saving
Build quality
Picked by 165 people this month!
Picked by 165 people this month!
Picked by 165 people this month!
Best Water Heater

9.9

1
Takagi T-H3-DV-N Condensing High Efficiency Natural Gas Indoor Tankless Water Heater, 10-Gallon Per Minute, 199,000 BTU
Functionality
Heat level
Ease of installation
Energy efficiency
Space saving
Build quality
Picked by 165 people this month!
Related Categories
Tankless Gas Water HeaterGas Water HeaterOutdoor Tankless Water HeaterRinnai Tankless Water HeaterHigh Efficiency Water HeaterRheem Tankless Water Heater
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Related Categories
Tankless Gas Water HeaterGas Water HeaterOutdoor Tankless Water HeaterRinnai Tankless Water HeaterHigh Efficiency Water HeaterRheem Tankless Water Heater
Related Categories
Tankless Gas Water HeaterGas Water HeaterOutdoor Tankless Water HeaterRinnai Tankless Water HeaterHigh Efficiency Water HeaterRheem Tankless Water Heater