Unlike conventional, single-stage furnace technology, Goodman’s DualSaver technology eliminates the temperature swings resulting from abrupt, high-stage stops-and-starts of the furnace by operating at a low heating state the majority of the time. This gas furnace has an AFUE rating of 80% which means that 80 cents of every $1.00 of heating energy expense warms your home.

Standard Features

• Patented TuffTube™ dual-diameter tubular heat exchanger with Lifetime Limited Warranty plus 10-year Furnace Replacement Limited Warranty
• Two-stage gas valve with revolutionary new Dual$aver control technology that allows installer to turn on two-stage operation with the flip of a dipswitch
• Silicon Nitride igniter with patented adaptive learning routine for maximum igniter life
• Energy-saving, quiet four-speed direct-drive circulator blower motor
• Integrated electronic furnace control board with self-diagnostics, low-voltage terminal block, and separate terminals 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 mode allows the homeowner to activate the lowest available heating speed to circulate air quietly and efficiently throughout the home during the off cycle
• Self-adjusting feature automatically adjusts furnace to high or low stage based on outside temperature without outdoor temperature sensor
• Quiet single-speed, induced-draft blower
• All “X” models comply with California NOx emissions standards

Cabinet Features

• Fully insulated, heavy-gauge steel cabinet with durable baked-enamel finish
• Foil-faced insulation lines the heat exchanger compartment
• GMH8 designed for multi-position installation; GDH8 designed for dedicated downflow only
• Removable bottom for side- or bottom-return applications
• Convenient left or right connection for gas and electric service
• Coil and furnace fit flush for most installations