Lennox GWM-100IE Gas-modulating Condensing Water Boiler

• Make: Lennox
• Model code: GWM-100IE
• Series: GWM-IE
• Type of Fuel: Natural
• Efficiency: 95% BTU

Offers an efficiency of up to 95% AFUE, meaning it converts up to 95% of its fuel into useable heat The burner matches heating output to household demand, using only the energy necessary to keep warm water flowing through pipes into radiators or baseboard heating system Inside the heat exchanger shell, specially designed helical tubes optimize condensing, allowing near-complete recovery of useable heat from the fuel source The modulating capability allows the burner to fire at different levels of heat, down to 20% of its full capacity Continuous modulation allows to maintain a precise temperature without constant on-and-off cycling, resulting in reduced sound levels and enhanced overall reliability