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. This furnace is run-tested for heating or combination heating/cooling applications. With a heavy-gauge, reinforced, insulated steel cabinet and durable baked enamel finish, this unit can be installed in a variety of locations.
Standard Features
- Patented TuffTube™ dual-diameter tubular heat exchanger
- with lifetime limited warranty plus 10-year limited furnace
- replacement warranty*
- Two-stage gas valve with revolutionary new convertible
- technology that allows installer to activate two-stage
- operation with the flip of a dipswitch
- Silicon Nitride igniter with patented adaptive learning
- control for maximum 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 based on outside
Cabinet Features
- Fully insulated, heavy-gauge steel cabinet with durable
- baked-enamel finish
- Foil-faced insulation lines the heat exchanger
- 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 and electric service
Coil and furnace fit flush for most installations
When you compare the performance qualities of the TuffTube™ heat exchanger to any of the competitive brands, you’ll discover why more and more homeowners are installing Goodman brand gas furnaces…they saying, “Thank goodness for Goodman”.
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Heating Capacity
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70,000 BTU (input)
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Effective Heating Capacity
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56,000 BTU (output)
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LP Gas Capacity
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48,000 BTU (output)
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Efficiency (AFUE)
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80%
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Blower Cooling Capacity
Up To
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4 Ton
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Configuration
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Upflow/Horizontal Flow
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Vent Diameter
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4" metal
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Unit Dimensions
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17 1/2"W x 28"D x 39"H
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Plenum Dimensions
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12 1/2"W x 19 5/8"D
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Voltage/Phase
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115 / 1 PH
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Max Breaker Size
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15 AMPS
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Shipping Weight
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143 Lbs
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