40,000 BTU 80% AFUE LoNox Upflow/Horizontal 2 Stage Gas Furnace Model Number GMH80403AX
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40,000 BTU 80% AFUE LoNox Upflow/Horizontal 2 Stage Gas Furnace Model Number GMH80403AX


Product Features

  • Dual-diameter tubular heat exchanger
  • Two-stage gas valve control technology allows installer to activate the two-stage valve with the flip of a dips witch
  • 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 out - puts 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 tem - perature 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
  • 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




Gas Furnace Brochure | Gas Furnace Specifications |

Installation Instructions




  • Item #: GMH80403AX
  • Manufacturer's Product Number: GMH80403AX
  • Condition: New

40,000 BTU 80% AFUE LoNox Upflow/Horizontal Gas Furnace

Price: $922.51
Sale Price: $553.50
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