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50,000 BTU Big Maxx Natural Gas Unit Heater

50,000 BTU Big Maxx Natural Gas Unit Heater

Item #:F260550 Model #: MHU50

Availability: Out of stock

Mr. Heater Big Maxx Forced Air Natural Gas Unit Heater is efficient and effective convection heat for your garage or workshop for residential or commercial use.



If you are looking to turn your garage or barn into a work space you can use all year-round, you will have to find a safe quiet and reliable heat source. This 50,000 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.
  • 50,000 BTU per hour
  • For use with natural gas
  • 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
  • Natural Gas to Liquid Propane conversion kit included
  • Thermostat sold separately

product details

Additional Information

BTU per Hour 50,000
Heating Area (Sq Ft) 2667
Tank Capacity (Min)
Run Time (Hrs at Max BTU)
Run Time (Hrs at Min BTU)
Fuel Consumption/Burn Rate (Gal/Hr)
Electricity Required No
Maximum Elevation (Ft)
Weight (Lbs) 70.00
Model MHU50
Oversized Yes
Length 25.00
Width 18.50
Height 17.00
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 Seperately
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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Customer Reviews

Mr Heater 50 btu
Review by Mark

Absolutely a Great heater, for any garage.. But it you need to service it, it not service friendly.
Difficulty changing circuit boards. Other that... great heater

(Posted on 10/15/2019)
Mr. Heater 50,000 BTU Hearter
Review by Dan

I installed this heater in my workshop and it works great. Very satisfied.

(Posted on 2/20/2017)
Mr. Heater 80,000 BTU Heater
Review by Mark

I installed one of these in my garage/workshop. It is a concrete block building. About 1000 square feet with 10 feet ceilings, with no insulation. It was easy and simple to install. The other day it was 25 degrees outside when I went out there to work, I turned on the heater and in about 30 minutes my shop was 60 degrees inside. I had to remove my jacket. I think I will be able to work out there all winter. The best thing I like is that it is installed hung from the ceiling up and out of the way not taking up valuable floor space. I would recommend this to any one who want good heat. It was just what I was looking for. Thanks Mr. Heater for a great product.

(Posted on 12/12/2016)

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