GENERAL

A new feature of the series MH12 heaters is a 3-step regulator valve that has a high setting and a low setting. The Infra-Red series MH12 camp heaters are tested and shipped from the factory assembled, except for the propane gas cylinder. The Camp Heaters will operate approximately – 1 ½ hours on a 14 oz. Cylinder - Disposable

18 ½ hours on No. 2011 P.O.L. Cylinder – Refillable 37 hours on No. 2020 P.O.L. Cylinder – Refillable

Above figures are calculated on the assumption that the heater is turned “Full On” at all times. Because it will not be necessary in many cases to have the heater turned “Full On” at all times, you can count on considerably longer burning times for each cylinder. Cylinders are available in most sporting goods stores, camping centers and propane outlets.

ASSEMBLY INSTRUCTIONS FOR MODEL MH12

DIRECTLY CONNECTED TO CYLINDER

1.Make sure Hi-Med-Low-Off knob is turned fully clockwise to “Off.”

2.Inspect the condition of the flat rubber washer in the regulator for dirt or damage. (Do this each time the cylinder is attached.)

3.Carefully screw the heater onto the cylinder filled with propane. (Make sure no open flame is in the area.)

4.Check its connection by brushing on soapy water. If bubbles occur, tighten connections and again brush on soapy water.

CONNECTIONS MUST BE GAS TIGHT. SEE LIGHTING INSTRUCTIONS BEFORE LIGHTING.

CAUTION: THIS APPLIANCE CONSUMES AIR.

When used indoors (such as in tents, tent trailers, fishing huts, cabins, houses, house trailers) ALWAYS BE SURE TO PROPERLY VENTILATE THESE ENCLOSURES in which the heater is being used, by providing a fresh air opening of at least 12 square inches. When used indoors (such as in the enclosures listed above), mount the appliance on a horizontal surface at least 24” above the floor and make sure the heater is NOT within 50 feet of flammable vapors and clear of all combustible materials by the following measurements:

Top:

20 ½ “

52.2 cm

DO NOT LEAVE YOUR APPLIANCE UNATTENDED.

Sides:

9”

22.9 cm

Front:

28”

71.2 cm

DO NOT OPERATE YOUR APPLIANCE WHEN SLEEPING.

Rear:

8”

20.3 cm

LIGHTING INSTRUCTIONS:

1.After complying with the Assembly Instructions, turn regulator valve knob anti-clockwise to “Low” position.

2.Apply lighted match to bottom of mesh screen.

3.Push in valve button to ignite, then slowly release after 20 seconds.

4.Repeat Step #2 and #3 if heater does not stay lit.

5.To turn heater “Off” –

Models MH12, MH12T – Turn regulator knob clockwise to “Off” position. Turn off gas supply at cylinder.

REGULATING:

Heater output can be adjusted by turning the valve knob to “Low”, “Med.” Or “Hi” position.

WARRANTY:

Camp Heaters No. MH12 series are covered by a one-year warranty against defective materials and workmanship, dating from the original purchase. Replacements will be made on any part returned prepaid through the dealer and claimed within the warranty period to be defective and found by the company upon examination to be so defective. Replacement shall be F.O.B.; Mr. Heater Corp. shall not be liable for drayage or labor costs.

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Mr. Heater MH12 manual General, Lighting Instructions, Regulating, Warranty
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MH12 specifications

The Mr. Heater MH12 is a versatile, portable propane heater designed to provide reliable warmth in a variety of settings. Whether you are camping, working in a garage, or facing a chilly outdoor environment, the MH12 delivers efficient heating performance coupled with user-friendly features.

One of the standout characteristics of the MH12 is its powerful output, generating up to 12,000 BTUs per hour. This makes it suitable for spaces up to 300 square feet, ensuring that you can comfortably heat a sizable area. The heater features an adjustable heat setting, allowing you to tailor the warmth to your specific needs. With its straightforward control dial, users can easily switch between high and low heat settings to maintain the desired temperature.

Portability is a key attribute of the Mr. Heater MH12. Weighing only 12 pounds, it is lightweight and easily transportable, making it perfect for outdoor events or when traveling. The heater is equipped with a solid base that ensures stability even in windy conditions, preventing spills or accidents.

Safety is prioritized in the design of the MH12, featuring an automatic low oxygen shut-off system, which immediately turns off the heater if the oxygen levels drop to unsafe levels. Additionally, the heater includes a tip-over safety shut-off, providing peace of mind while in use. These essential safety features make the MH12 suitable for both indoor and outdoor use, although proper ventilation is still required when used indoors.

In terms of design, the MH12 sports a sturdy and durable construction. It features a sturdy steel frame and a high-temperature ceramic burner element, ensuring longevity and consistent performance. The heater operates efficiently on a standard 20-pound propane tank, providing a hassle-free energy source that can be easily replaced or refilled.

For added convenience, the Mr. Heater MH12 is compatible with various accessories, such as a propane tank adapter or hose, allowing for even more flexibility in its use. Its compact size also makes it easy to store when not in use.

In summary, the Mr. Heater MH12 is a powerful, portable propane heater that combines efficiency, safety, and convenience. With its robust design and user-friendly features, it is an excellent choice for anyone looking to keep warm in diverse environments. Whether for recreational activities or emergency situations, the MH12 is a dependable heating solution.
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