10 bestResidential Boilersof December 2025
112M consumers helped this year.
1
Rinnai i060CN Condensing Gas Boiler, Natural Gas (60K BTU)
Rinnai
9.8
2
Rinnai i150SN Condensing Gas Boiler, Whole Home Natural Gas Heater with Space-Saving Design and Smart Features, (150K BTU)
Rinnai
9.6
3
Thermo 2000 BTH Ultra 24 kW / 81,888 BTU Electric Boiler for Water and Glycol Radiant Floor hydronic Heating System
Thermo 2000
9.4
4
Thermo 2000 BTH Ultra 18 kW / 61416 BTU Electric Boiler for Water and Glycol Radiant Floor hydronic Heating System
Thermo 2000
9.1
5
Thermo 2000 BTH Ultra 15 kW / 51180 BTU Electric Boiler for Water and Glycol Radiant Floor hydronic Heating System
Thermo 2000
8.8
Other
Water to Air Heat Exchanger 20x20 with Copper Ports for Outdoor Wood Furnaces, Residential Heating and Cooling, and Forced Air Heating (20x20)
WATTS SB1156F Boiler Pressure Relief Valve
Viessmann 7834235 Ionization Electrode with Gasket for Vitodens WB2B Series
WATTS 1/2 inch B911-M3 Threaded Combination Water Feeder and backflow Preventer
5% off
6
FOGATTI Propane Gas Tankless Water Heater, Indoor 13L, 4.0 GPM, 90,000 BTU Instant Hot Water Heater, InstaGas Classic 90 Series
FOGATTI
8.6
7
360K BTU Stainless Steel 316L Pool/Hot Tub/Spa Heat Exchanger Same Side Ports 2" and 1 1/2" FPT
AB
8.3
8
Onsen - 14L Direct Vent Tankless Propane Water Heater - Electronic Ignition - Hot Water On Demand - for Indoor Residential Tiny Home Use - with LED Screen & Display Panel - 120v
ONSEN
8.0
9
24x24 Heat Exchanger Water To Air , Forced Air Heating with 1" Copper Ports Hot Water Coil for Outdoor Wood Furnaces, Residential Heating
GPOAS
7.7
10
Viessmann 7828718 Ignitor & Ionization Electrode for Vitodens B1HA/B1KA/WB1B/WB1Bc Series
Viessmann
7.4
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