- Efficiency rating of 80% AFUE can save you hundreds of dollars each year compared to older furnaces. - Sealed blower compartment minimizes losses and maximizes efficency and comfort. - Dual-fuel capabilitycan be combined with an electric heat pump to enhance comfort and fuel efficiency by alternating between electric and gas heat, optimizing energy use and minimizing heating costs - Duralok Plus heat exchangermade of high-quality, patented ArmourTuf aluminized steel - Hot surface ignitercontrols furnace operation to ensure reliable, efficient performance - 20-Year Limited Warranty on heat exchanger - 5-Year Limited Warranty on covered components