MHUniversity Garage Shop Heaters

99.9% Efficient. That is what these garage heaters offer. Whether you use it in your garage to keep your cars warm or in your shop to keep the work force busy and comfortable, this garage heater transfers almost all of the fuel it burns directly into clean safe radiant heat. Utilizing a unique power pile thermocouple to control the valve, there is no electricity required. Just hook-up the included millivolt thermostat with the appropriate wire - not included - then mount the heater to the wall and make the gas connection, then you are ready to go. Clean, safe, radiant heat whenever you need it.

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Garage/Shop Radiant Heater FAQs
Garage/Shop Radiant Heater Manuals and Troubleshooting Guides
Garage/Shop Radiant Heaters
Garage/Shop Radiant Heater Accessories
Parts Ordering

Garage/Shop Radiant Heater FAQs

The pilot will not light?

Check gas supply, either natural gas or propane, and the connection to be sure it is tight. If it is a new propane tank or just a refilled tank, it may have air in the top of the tank that needs to be bled off by propane supplier. The pilot tube may also be blocked by dirt, dust, or insects. Clean thoroughly.

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What does the heating area square feet mean?

Square footage is the length of an area times the width of an area. Knowing the square footage of an area allows you to estimate the amount of BTUs necessary to heat the area most effectively. A generally accepted formula is: Square Footage x 40 = required BTUs. This is just a starting point. Ceiling height, building layout, and level of insulation will also factor into your BTU needs.

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What is W.C. (Water Column) and how do I measure it?

All gases are measured in W.C. because it is used to measure small differences in low pressure across an orifice or pipeline. Low pressure is any pressure below 1 Pound per Square Inch (PSI). When dealing with pressures below 1 PSI, you will see the term inches or inches of water column. This refers to the amount of pressure it takes to raise a column of water 1 inch. There are 27.7 inches of water column (W.C.) pressure in 1 PSI of pressure. W.C. is measured with a manometer (pressure gauge), which measures the pressure of gases and vapors. If you need to measure your W.C., we highly recommend you contact your local gas company to send out a professional or have someone who is HVAC certified to test it.

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The heater will not start-up for the first time this year.

Be sure the gas supply is turned on, and that the pilot light is lit. If the pilot will not light check for blockage, in the pilot tube, from spiders or mud wasps.

Cleaning Pilot Tube on Overhead Radiant Heaters

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The pilot will light but the heater will not turn on.

Blockage in the main gas orifice or dirt and dust can block the flow of gas, clean unit per operators manual. Check to be sure that the wiring to the thermostat is not faulty and that the electrical connections on the thermostat are clean.

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The heater is clean the pilot flame goes out when the thermostat is turned up?

First check that the wiring from the thermostat to the gas valve is correct.

High Intensity Radiant Heater Diagram

The pilot light might be too short to supply enough heat to the thermocouple for correct operation. Adjust the pilot length using the screw marked on the gas valve "pilot adjustment" per the instructions in the operator's manual.  After all else is checked, the thermocouple may be weak and cannot supply enough power to operate the main gas valve burners electrical solenoid.

Pilor and Main Burner Flame Adjustments

Pilot and Main Burner Flame Adjustments

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Do you need to order parts?

For your convenience please enter your serial number below to access Mr. Heater’s interactive schematic & parts ordering system. This system will allow you to browse your specific product schematic to order the correct service parts as well as download a complete manual for your make & model year.  If your product was produced any year prior (2011 and earlier), please call our Service Department at 1-800-251-0001, where our technicians will gladly assist you.


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We try to make our FAQs as comprehensive as possible but sometimes things are missed!  We apologize for the inconvenience and ask that you contact us so we may assist you.  You have multiple options to get a hold of us:

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Garage/Shop Radiant Heater Manuals and Troubleshooting Guides

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Parts Ordering

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