Standard Features
• Dual-diameter tubular heat exchanger
• Two-stage gas valve with Dual$aver™ technology that
allows installer to activate the two-stage valve with the
flip of a dipswitch
• 110V Silicon Nitride igniter
• 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 to high or low
stage based on outside temperature without an outdoor
temperature sensor
• Dual-certified for sealed combustion direct vent
(2-pipe) or non-direct vent (1-pipe) applications
• Easy-to-install top venting is standard; alternate flue/vent
located on the right (GMH95)
• All 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
• Designed for multi-position installation —
GMH95: upflow, horizontal left or right;
GCH95/GCH9: downflow, horizontal left or right
• Airtight solid bottom for side-return applications and easycut
tabs for effortless removal in bottom air inlet applications
• Convenient left/right connection for gas/electric service
• Coil and furnace fit flush for most installations