Mr. Heater Big Maxx Unit Heater 50,000 BTU/Hr.

SKU: F260550
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Mr. Heater

  • $879.99
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For Service Parts Ordering
It is up to the customer to ensure that they are ordering the correct part number. For help obtaining part numbers please contact:

HeatStar: 1-866-447-2194
Enerco: 1-888-849-1899
Mr. Heater, Cleveland Iron Works, and BaseCamp: 1-800-251-0001


  • 50,000 BTU per hour
  • For use with natural gas - Natural Gas to Liquid Propane conversion kit included
  • Heats up to 1,250 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


Turn your garage or barn into a work space you can use all year-round, with this safe quiet and reliable heat source.

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 50,000
Heating Area (Sq Ft) 1,250
Electricity Required No
Weight (Lbs) 70.00
Model MHU50
Oversized Yes
Length 25.00
Width 18.50
Height 12.00
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 Yes
Safety Tip-Over Switch No
Fuel Type Natural Gas
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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