Product details:

Advanced Heat Exchanger Design The GMES80 furnace employs a reliable dual-diameter tubular heat exchanger design. Aluminized steel is used for incredibly efficient heat transfer, and a wrinkle-bend is applied to the tubes to enhance the heat exchanger's dependability and longevity. Multi-Speed ECM Motor The GMES80's energy efficient blower motor uses the lowest speed it can to deliver precise temperature control for your home while keeping utility bills to a minimum. Quiet Comfort