Model numbers: MH-40-GFA, MH-60V-GFA-A, MH-125V-GFA-A, MH-150V-GFA-A, MH-150NGT-GFA-A, MH-375T-GFA-A
Frequently Asked Questions
Can I hook up a thermostat to my Gas Forced Air Heater?
External thermostats cannot be used on any of our Propane heater units. We do sell a 375,000 BTU propane forced air heater and a 150,000 BTU natural gas forced air heater, both with built- in thermostats.
How long is my warranty?
All of our propane and natural gas heater units come with a limited one-year warranty.
Where can I find my model number?
The model number is found on the front of the base. It is also located on the outside of the heater’s carton by the UPC.
Where can I find my serial number?
The serial number is found on the front of the base.
Can I use a longer hose?
We do not recommend switching the hose that came with the Propane Forced Air Heater with a longer hose. The hose included is designed for this intentional use of the product only.
The heater runs for about 15 minutes then shuts off.
The fuel tank may be low on fuel, Tank maybe too small for the heater, not providing enough vapor to run such a large heater. Another possibility is the inlet or outlet of the heater are being restricted and causing the high temperature switch to activate prematurely.
I have a full tank, but the colder it gets, the less heat I am receiving.
In general, liquid propane is always trying to become a gas and escape the tank. (It boils at –44 degrees F, unless it is under pressure). When the air surrounding the tank is cold, the liquid propane is less willing to become a gas, thus lowering the pressure. Basically, a full tank in 70 degrees F will exert a lot more pressure than a full tank in 30 degrees F. Ambient temperature outside the tank determines the pressure of the propane, as long as you have some liquid inside the tank and the liquid does not exceed 80% of the tank (which explains why you never receive a full tank of liquid propane).
How can I convert gallons to cubic feet?
To convert gallons to cubic feet, simply multiply it by 36.28 (60°F at sea level). This factor may vary depending on altitude, temperature and meter type.
My 50,000 or 60,000 BTU GFA heater’s igniter is still clicking. Is that normal?
The MH-50V-GFA, MH-60V-GFA, MH-125V-GFA and MH-150V-GFA all contain what is called “Continuous Electronic Ignition”, and is perfectly normal.
How much pressure will I receive from my propane tank on a cold day?
Vapor pressure (PSI) is determined by the ambient temperature. Please see our Propane Vapor Pressure Chart:
(Propane boils at –44 degrees F)
How do I order parts for my heater?
Parts can be ordered by contacting us at (800) 779-3267.
How much ventilation do I need to use my heater safely?
The standard is to always provide a fresh air opening in the heated space of at least 3 square feet (2,800 sq. cm.) for each 100,000 BTU/Hr of heater output. For example, a MH-125V-GFA (125,000 BTUs/Hr) heater will require:
- A two car garage door open 6 inches, or
- A two car garage door open 9 inches, or
- Two 32" (thirty two inch) wide windows to be open 15 inches