Mr. Heater Big Maxx Unit Heater 80,000 BTU/Hr.

  • SKU: SKU: F260560

    • $1,005.99
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    • 80,000 BTU per hour
    • For use with Natural Gas - Natural Gas to Liquid Propane conversion kit included 
    • Heats up to 2,000 sq. ft.
    • Spark ignition features self-diagnostic control module
    • Includes 2 angle brackets for ceiling mount
    • Low Profile Design - Can be installed in low-ceiling buildings
    • Minimum 8 ft clearance from floor to base of heater required
    • 1/2in gas connection
    • Category 1 vertical, category 3 horizontal venting


    If you are looking to turn your garage or barn into a workspace you can use all year-round, you will have to find a safe quiet and reliable heat source.

    This 80,000 BTU Natural Gas Unit heater is the way to go. It uses a built-in electric high-velocity fan to pull cool air into the rear of the heater, across a heat exchanger, then forcing warm air into the surrounding areas.

    These heaters only require 115v AC power and can be vented vertically or horizontally - please check local codes and restrictions. With a mounting clearance of only 1 inch, the supplied brackets, external access to power, and thermostat connections - installation is a cinch.

    With the Durable Spark ignition and robust factory standard self-diagnostic control module, we can offer a 3-year factory warranty on all parts and burners and a 10-year warranty on any defects in the heat exchanger.

    This heater offers the operating versatility and safety that you have come to expect from Mr. Heater. 


    Show Download Tool No
    BTU per Hour 80,000
    Heating Area (Sq Ft) 2,000
    Tank Capacity (Min) No
    Run Time (Hrs at Max BTU) No
    Run Time (Hrs at Min BTU) No
    Fuel Consumption/Burn Rate (Gal/Hr) No
    Electricity Required No
    Maximum Elevation (Ft) No
    Weight (Lbs) 88.45
    Model MHU80
    Oversized Yes
    Length 25.00
    Width 18.50
    Height 17.00
    Disclaimer No
    Use Residential Garages, Metal Buildings, Warehouses, Agricultural Building, Storage Buildings
    Warranty 3 year Limited on parts and burner, 10 year limited on heat exchanger
    Thermostat Sold Separately
    Safety Tip-Over Switch No
    Fuel Type Propane
    Heat Type Forced Air
    Oxygen Depletion Sensor (ODS) No
    High Limit Safety Shut-off (HLS) Yes
    Indoor Safe No
    Ignition Electronic
    Hose & Regulator Included No

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