Goodman 80% GMH8/GDH8 Gas Furnace
Standard Features
• Dual-diameter tubular heat exchanger
• Two-stage gas valve Dual$aver™ technology that allows
the installer to activate the two-stage valve with the flip
of a dipswitch
• 110V Silicon Nitride igniter
• Quiet four-speed direct-drive circulating blower motor
• 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
• Certain models available with low NOx emissions
Cabinet Features
• Fully insulated, heavy-gauge steel cabinet with durable
baked-enamel finish
• Foil-faced insulation lines the heat exchanger compartment
• 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
Up to 80% AFUE
Multi-Speed, Multi-Position Installation
Outstanding Warranty Protection
The heat exchanger in the furnace is covered by a Lifetime Limited Warranty for the original, registered homeowner and if it fails during the first 10 years of ownership, we will replace the entire unit. This furnace also has a 10-Year Parts Limited Warranty on all other functional parts. For a full description of all warranties applicable to this product, please review the consumer brochure or product warranty by clicking on the links above.
Unlike conventional, single-stage furnace technology, Goodman’s technology helps eliminate 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.