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The Goodman GMH8/GDH8 80% AFUE Two-Stage (Convertible),
Multi-Speed Multi-Position 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 units can be installed in a variety of
locations.
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
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