10 bestTankless Gas Water Heatersof December 2025
112M consumers helped this year.
1
RINNAI RXP199iN Condensing Tankless Water Heater RXP199 Features 0.96 UEF with 199k BTU and Pump.
Rinnai
9.9
2
Takagi T-H3-DV-N Condensing High Efficiency Natural Gas Indoor Tankless Water Heater, 10-Gallon Per Minute
Takagi
9.8
3
RINNAI Ru Series Sensei Se+ Tankless Hot Water Heater: Indoor Installation
Rinnai
9.6
27% off
4
RINNAI RX160iN Condensing Tankless Water Heater RX160 Features 0.95 UEF with 160k BTU.
Rinnai
9.4
5
Rinnai RSC199iN Smart-Circ Condensing Gas Tankless Water Heater, Super High Efficiency Plus Natural Gas Water Heater, Up to 11 GPM, Indoor Installation, 199,000 BTU
Rinnai
9.1
Other
RINNAI V Series He Tankless Hot Water Heater: Indoor Installation
Rinnai V53DeN Natural Gas Tankless Hot Water Heater, 5.3 GPM, Outdoor Installation
Rheem Mid-Efficiency 7.0GPM Indoor Liquid Propane Tankless Water Heater
Takagi T-H3M-OS-N Condensing Outdoor Tankless Water Heater, Natural Gas
6
Noritz NRCB180DV-NG Indoor Direct Combination Boiler (Standard Vent Convertible) with Built-in Pump, Max 180,000 Dhw, 9.8 Gpm, 100,000 Btuh Space Heating-Natural Gas
Noritz
8.9
7
Rinnai RL75iN Natural Gas Tankless Water Heater, 7.5-Gallons Per Minute
Rinnai
8.6
8
Ranein Propane Gas Tankless Water Heater with Vent Pipe, Indoor Max 4.3 GPM, 100,000 BTU Instant Hot Water Heater
Ranein
8.4
5% off
9
Rinnai RUCS65IP Ultra Series Tankless Water Heater, White
Rinnai
8.1
10
Rinnai RE140iP Non-Condensing Propane Tankless Water Heater, Up to 5.3 GPM, Indoor Installation, 140,000 BTU
Rinnai
7.8
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