The Direct Comfort GMH8/GDH8 Gas Furnaces feature a patented aluminized-steel tubular heat exchanger and durable Silicon Nitride Hot Surface Ignition system. These furnaces are run-tested for heating or combination heating/cooling applications. With a heavy-gauge, reinforced, insulated steel cabinet and durable baked enamel finish, these furnaces can be installed in a variety of locations.

Standard Features:

• Dual-diameter tubular heat exchanger
• Two-stage gas valve Dual$aver technology that allows installer to activate the two-stage valve with the flip of a dip-switch
• 110V Silicon Nitride igniter designed for long igniter life
• Furnace control board with self-diagnostics, color-coded low-voltage terminals, and provisions for electronic air cleaner and 24-volt humidifiers
• Control board stores the last five diagnostic codes in memory; simple push-button activation outputs the fault history to a flashing red LED
• Low constant fan allows homeowner to activate the low heat speed to efficiently circulate air throughout the home.
• Self-adjusting feature automatically adjusts furnace to high- or low-stage operation based on outside temperature without an outdoor temperature sensor

Cabinet Features:

• Fully insulated, heavy-gauge steel cabinet with durable baked-enamel finish
• Foil-faced insulation lines the heat exchanger
• Factory-sealed to achieve 2% or less leakage rate at 1.0 water gauge external duct static pressure
• Designed for multi-position installation: upflow, horizontal left or right
• Removable bottom for side or bottom return applications
• Convenient left or right connection for gas/electric service
• Coil and furnace fit flush for most installations