10 bestTankless Gas Water Heatersof September 2025
112M consumers helped this year.
15% off
1

Ranein Propane Gas Tankless Water Heater with Vent Pipe, Indoor Max 4.3 GPM, 100,000 BTU Instant Hot Water Heater
Ranein

9.9
2

RINNAI RXP199iN Condensing Tankless Water Heater RXP199 Features 0.96 UEF with 199k BTU and Pump.
Rinnai

9.8
3

Rinnai RL75iN Natural Gas Tankless Water Heater, 7.5-Gallons Per Minute
Rinnai

9.6
4

RINNAI Ru Series Sensei Se+ Tankless Hot Water Heater: Indoor Installation
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

9.2
Other
14% off
6

RINNAI RX160iN Condensing Tankless Water Heater RX160 Features 0.95 UEF with 160k BTU.
Rinnai

9.0
7

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

8.7
8

Rinnai V53DeN Natural Gas Tankless Hot Water Heater, 5.3 GPM, Outdoor Installation
Rinnai

8.5
14% off
9

Rinnai RUCS65IP Ultra Series Tankless Water Heater, White
Rinnai

8.2
10

Rinnai RE140iP Non-Condensing Propane Tankless Water Heater, Up to 5.3 GPM, Indoor Installation, 140,000 BTU
Rinnai

7.9

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