10 Best Gas Boilers For Home Heating of December 2025

• Rinnai M060SN - Natural Gas Condensing Boiler
• Flexible venting options with approved Concentric, PVC, CPVC, Stainless Steel, Polypropylene (rigid and flex), for single-pipe exhaust, room air and two-pipe systems
• Stainless steel primary boiler heat exchanger for unmatched performance and durability; Copper nickel integrated DHW plate heat exchanger
• Compact wall-mounted design saves space over traditional boilers
• Features an integrated modulating pump, and outdoor reset sensor (in the box)

Rinnai

• *LCD TOUCH SCREEN: elegant appearance, single-sided design, scratch-resistant. Large LCD touch screen display with backlight, easy to read
• *APP/VOICE CONTROL & MANUAL/AUTO MODE: Smart control, thermostat that can be controlled by mobile phone (APP: Tuya/Smart Life. Voice control by GoogleHome Alexa). You can freely choose manual or automatic mode according to different purposes
• *PROGRAMMABLE: The thermostat supports different temperature settings through 6 time modes every day
• *ACCURATE TEMPERATURE: internal sensor floor sensor, perceivable ambient temperature and floor temperature. The temperature is automatically acquired with an accuracy of 1°C
• *MEMORY & CHILD LOCK: Don't worry about data memory when power is off. The keyboard lock function of the child lock is designed to prevent misuse by children and avoid parents’ concerns

Damaila

• Lifetime warranty
• Save up to 60-percent on your water heating cost with an ECOSMART electric tankless water heater
• Never run out of hot water with an ECOSMART tankless water heater
• Patented Self Modulating Technology and design
• ECOSMART tankless water heaters are 99.8-percent energy efficient.Uniform Energy Factor:0.98

EcoSmart

• [Quality Material] Made of premium flame-retardant PC and ABS material, more durable & safer.
• [3.5-inch Large Display Screen] High-definition VA LCD screen with backlight, easy to operate and read values in low illumination environment.
• [One-touch Temperature Control] Preset temperatures maintain within ±1°C.
• [5+1+1 Six Periods Programmable] Maximize comfort and economy.
• [Data Memory Function] Data will be automatically memorized when it powers off so that you don' t need to worry about data lost when the power is suddenly off.

VISLONE

Centrica Hive Limited

• Savings of up to 50% on water heating costs. Dimensions :17H x 17W x 3.625D inches ;Pipes fittings :3/4 inch NPT
• Digital temperature control in 1-degree increments allows control of hot water; Activation Flow: 0.3 GPM
• Copper and stainless components designed for efficiency, durability and easy replacement.
• Compact size saves valuable storage space, while the stylish and advanced design is pleasing to the eye and Copper and stainless components designed for efficiency, durability and easy replacement.
• Prior to purchase & installation, please verify that this model is the right size for your hot water needs and electrical requirements. Electrical requirements: 27 kW, 240 volts, (3) 40 required breakers, 112.5 maximum power (AMP), (3) 8 required wire.Amperage Draw:113 A
• Required Breaker Quantity: Three 40 Amp Double Pole
• Recommended Electrical Panel: 200 Amps
• NEVER run out of hot water with an ECOSMART tankless water heater.
• Save up to 12 cubic feet of storage space.
• Digital temperature control in 1-degree increments gives users complete control of hot water

EcoSmart

• Rinnai i120SN - Natural Gas Condensing Boiler
• The i120SN condensing gas boiler heat-only model offers the comfort of whole home heating.
• This heat-only model offers an outdoor reset to optimize your home heating performance and features an integrated modulating pump, with an outdoor reset sensor (in the box)
• Excellent operational performance with 95% AFUE efficiency and Energy Star Most Efficient certified.
• Convenient control options with the ability to connect two zone pumps to the PCB.
• Easy parameter settings and a user-friendly interface.
• Versatile venting options including 2-inch PVC up to 65 feet.
• Quick Natural Gas (NG) to Propane (LP) gas conversions (kit included)

Rinnai

• Endless hot water, On-demand usage, Compact, Space saving, Energy conservation
• Computerized safety features, No pilot light to have to worry about
• Safety features include freeze, overheat, surge protection, and troubleshooting diagnostic codes
• Satisfies the 2012 SCAQMD Rule 1146.2 for Ultra-Low NOx Emissions
• Primary heat exchanger utilizes commercial-grade copper alloy for 25 times better heat transfer than stainless steel, Integrated controls and power cord as standard features

TAKAGI

DEWALT