Specifications
G
as
F
urnaces
The Amana
®
Distinctions™ brand GMH8 TwinComfort™ (Convertible), Multi-Speed Multi-Position Gas Furnace features a
patented aluminized-steel, dual-diameter 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 nish, this unit can be installed in a variety of locations.
GMH8 — TwinComforT
™
(ConverTible), mulTi-Speed GaS furnaCe
Product Features
• Patented aluminized-steel, dual-diameter tubular heat exchanger
• Convenient 33⅜” height unit
• Two-stage gas valve with convertible technology that allows installer
to activate two-stage operation with the ip of a dipswitch
• Durable 110V Silicon Nitride igniter
• Furnace control board with self-diagnostics, color-coded low-
voltage terminals, and provisions for electronic air cleaner and
24-volt humidiers
• Control board stores the last ve diagnostic codes in non-volatile
memory; simple push-button activation outputs the fault history
to a ashing red LED
• Low constant fan speed allows homeowner to activate the low-heat
speed fan and to efciently circulate air throughout the home
• Self-adjusting feature automatically adjusts furnace to high or low
stage based on outside temperature without the need for an outdoor
temperature sensor
• Fully insulated heavy-gauge steel cabinet with durable baked-enamel nish
• Foil-faced insulation lines the heat exchanger
• Designed for multi-position installation: upow, 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 t ush for most installations
GMH80453AN* 45,000 36,000 80% 3 14 28 33⅜ 115
GMH80703AN* 70,000 56,000 80% 3 14 28 33⅜ 125
GMH80704BN* 70,000 56,000 80% 4 17½ 28 33⅜ 136
GMH80903BN 90,000 72,000 80% 3 17½ 28 33⅜ 146
GMH80904BN* 90,000 72,000 80% 4 17½ 28 33⅜ 146
GMH80905CN* 90,000 72,000 80% 5 21 28 33⅜ 154
GMH81155CN* 115,000 92,000 80% 5 21 28 33⅜ 154
GMH81405DN* 140,000 112,000 80% 5 24½ 28 33⅜ 153
* Denotes low NOx models ¹ Max tons @ 0.5” ESP
Goodman Company, L.P., reserves the right to discontinue, or change at any time, specifications or designs without notice or without incurring obligations.
* Complete warranty details available from your local dealer or at www.amana-
hac.com. To receive the Lifetime Heat Exchanger Limited Warranty (good for as
long as you own your home), 10-Year Unit Replacement Limited Warranty and
10-Year Parts Limited Warranty, online registration must be completed within 60
days of installation. Online registration is not required in California or Quebec.