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Goodman GMH81405DN 80% AFUE 140k BTU Two-Stage Convertible Multi-Speed Gas Furnace

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    Product Description


    The art of precision

    Distinctive, Heavy-Duty Heat Exchanger Technology - Constructed from tubular aluminized-steel, the primary heat exchanger is designed for outstanding durability and heat transfer. The use of wrinkle bend technology maintains the wall strength of the tubular design and aids in the efficient transfer of heat.

    Two-Stage Gas Valve - Automatically adjusts to the most efficient amount of gas needed to reach and maintain the temperature selected on the thermostat.

    Goodman gas furnaces simply work the way they’re supposed to, making each one a thing of beauty.

    Energy-Efficient Multi-Speed Blower Motor - Provides airflow to match comfort needs, reduces energy consumption and system noise compared to a single-speed motor.

    Durable Silicon Nitride Igniter - This energy-saving technology eliminates the need for a traditional pilot light. The igniter is constructed for both strength and outstanding reliability.

    Quiet, Single-Speed Induced-Draft Blower - Provides precise control and enhanced energy-efficient performance as compared to a natural draft furnace.

    Self-Diagnostic Control Board - Silently and consistently monitors the gas furnace to ensure all furnace components are working properly and helps to achieve the energyefficient performance too. Also, allows for quick troubleshooting when gas furnace needs maintenance.

    Insulated Furnace Cabinet - Even the metal walls of this gas furnace support energyefficiency. A fully insulated cabinet helps to keep the heat inside the furnace and has less than a 2% air leakage rate. The insulation also assists with noise suppression when the furnace is operating.

    Standard Features

    • Heavy-duty aluminized-steel dualdiameter, tubular heat exchanger
    • Two-stage convertible gas valve automatically adjust to high or low stage
    • Durable Silicon Nitride igniter
    • Quiet single speed draft inducer
    • Self-diagnostic control board with constant memory fault code
    • Color-coded low-voltage terminals with provisions for electronic air cleaner and humidifier
    • Multi-speed blower motor
    • Low continuous fan speed options offer quiet air circulation
    • California Low NOx emissions standards models available
    • For installation in California’s South Coast Air Quality Management District (SCAQMD) only: This furnace does not meet the SCAQMD Rule 1111 14 ng/J NOx emission limit, and thus is subject to a mitigation fee of up to $450. This furnace is not eligible for the SCAQMD Clean Air Furnace Rebate Program:
    • AHRI Certified; ETL Listed

    Cabinet Features

    • Multi-position installation:
      • GMH8: upflow, horizontal left or right
      • GDH8: dedicated downflow
    • Convenient left or right connection for gas and electrical service
    • Cabinet air leakage (QLeak) ≤ 2%
    • Heavy-gauge steel cabinet with durable baked-enamel finish
    • Fully insulated heat exchanger and blower section


    General Characteristics

    GMH8 1405D*B
    Heating Data
    Input 140,000
    Natural Gas Output 112,000
    LP Gas Output 96,000
    AFUE 1 80
    Available AC @ 0.5" ESP 5
    Temp. Rise Range (°F) 40 - 70
    Circulator Blower
    Size (D x W) 11" x 10"
    Horsepower @ 1075 RPM 3/4
    Speed 4
    Vent Diameter 2 4"
    No. of Burners 6
    Electrical Data
    Min. Circuit Ampacity 3 14.7
    Max. Overcurrent (amps) 4 15
    Ship Weight (lbs) 132
    ¹ DOE AFUE based upon Isolated Combustion System (ICS)
    ² Vent and combustion air diameters may vary depending upon vent length. Refer to the latest editions of the National Fuel Gas Code NFPA 54/ANSI Z223.1 (in the USA) and the Canada National Standard of Canada, CAN/CSA B149.1 and CAN/CSA B142.2 (in Canada).
    ³ Minimum Circuit Ampacity = (1.25 x Circulator Blower Amps) + ID Blower amps. Wire size should be determined in accordance with National Electrical Codes. Extensive wire runs will require larger wire sizes.
    ? Maximum Overcurrent Protection Device refers to maximum recommended fuse or circuit breaker size. May use fuses or HACR-type circuit breakers of the same size as noted.


    • All furnaces are manufactured for use on 115 VAC, 60 Hz, single-phase electrical supply.
    • Gas Service Connection 1/2" FPT
    • Important: Size fuses and wires properly and make electrical connections in accordance with the National Electrical Code and/or all existing local codes.
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