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This is an unvented portable heater. It uses air (oxygen) from the 

area in which it is used. Adequate combustion and ventilation air 

must be provided. Refer to VENTILATION on Page 9.

Not for use in residential living areas or in non-adequately venti-

lated enclosed spaces. Never bring or store a propane cylinder 

indoors.

DO NOT OPERATE THIS HEATER UNTIL YOU HAVE READ 

AND THOROUGHLY UNDERSTAND THESE SAFETY AND

OPERATING INSTRUCTIONS.

Failure to comply with the precautions and instructions provided with this heater can result 

in death, serious bodily injury, property loss or damage from the hazards of fire, explosions, 

burns, asphyxiation or carbon monoxide poisoning. Only persons who can read and 

understand these instructions should use or service this heater. 

CALIFORNIA RESIDENTS: 

This product contains chemicals, 

including lead, known to the State of California to cause birth 

defects or other reproductive harm. 

Wash hands after handling.

EXTREMELY HOT DURING OPERATION! 

Do Not touch any 

metal components  while in operation. Keep gasoline and any other 

flammable liquids away from hater.

DANGER

WARNING

WARNING

WARNING
WARNING

GAU-GFH-CH-18K

CARBON 

MONOXIDE 

POISONING MAY 

LEAD TO DEATH!

The products described in this manual are 

propane direct-fired, forced air heaters. Propane 

forced air heaters are primarily intended for 

use for temporary heating of buildings under 

construction, alteration or repair. Direct-fired 

means that all of the combustion products of the 

heater enter the heated space. This appliance 

is rated at 98% combustion efficiency, but does 

produce small amounts of carbon monoxide.

Carbon monoxide is toxic. Humans can tolerate 

only small amounts of carbon monoxide and so 

precautions should be taken to provide proper 

ventilation. Failure to provide proper ventilation 

in accordance with the instructions in this manual 

can result in death.

People with breathing problems should consult a 

physician before using this heater. 
Early signs of carbon monoxide poisoning 

resemble the flu. Symptoms of improper 

ventilation / carbon monoxide poisoning are:

Headache • Dizziness • Nausea • Dry Mouth 

Sore Throat • Burning of Nose and Eyes

If you experience any of these symptoms: 

GET FRESH AIR AT ONCE! 

Have your heater 

serviced and check for proper ventilation. Some 

people are more affected by carbon monoxide 

than others. These include: pregnant women, 

those with heart or lung problems, anemia or those 

under the influence of alcohol or at high altitudes. 

FOR OUTDOOR USE. INDOOR USE 

PERMITTED ONLY FOR: The temporary 

heating of adequately ventilated buildings or 

structures under construction, alteration or 

repair! Provide at least a three square foot  

(2,800 sq cm) opening of outside air for 

every 100,000 Btu / Hr heater rating. Refer to 

“Ventilation” on page 8 for further instructions.

Safety Information

RISK OF INDOOR

WARNING

AIR POLLUTION!

DANGER

Larson Electronics, LLC

 

  Phone: (800) 369-6671 

 Fax: (903) 498-3364 

  www.larsonelectronics.com 

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Summary of Contents for GAU-GFH-CH-18K

Page 1: ...OR MAY CONTAIN VOLATILE OR AIRBORNE COMBUSTIBLES OR PRODUCTS SUCH AS GASOLINE SOLVENTS PAINT THINNERS DUST PARTICLES OR UNKNOWN CHEMICALS READ AND SAVE THESE INSTRUCTIONS Safety Information DANGER WA...

Page 2: ...construction alteration or repair Direct fired means that all of the combustion products of the heater enter the heated space This appliance is rated at 98 combustion efficiency but does produce small...

Page 3: ...ormation GAU GFH CH 18K ALWAYS install the heater so that it is not directly exposed to water spray rain dripping water or wind Use heater in accordance with all local codes and with CSA 5 90 U S 5th...

Page 4: ...sed without alteration Unpacking CAUTION NEVER LEAVE HEATER UNATTENDED WHILE BURNING CONNECTED TO A POWER SOURCE OR WHILE CONNECTED TO A FUEL SOURCE RISK OF FIRE ALWAYS LOCATE HEATER ON A STABLE AND L...

Page 5: ...NT Always use a propane LP cylinder that has a connection device that is compatible with the hose and regulator assembly supplied Remove the back cover by sliding the cove straight up and away from th...

Page 6: ...and upright Avoid tipping the LP cylinder on its side when connected to a regulator since this may cause damage to diaphragm in the regulator Handle valves with care Never connect an unregulated LP cy...

Page 7: ...iter button several times to ignite the center burner panel 6 Continue to hold valve knob down for 30 seconds after the panel has lit This will heat the thermocouple After 30 seconds release the valve...

Page 8: ...n adequately ventilated enclosed spaces DANGER DANGER NEVER LEAVE HEATER UNATTENDED WHILE BURNING CONNECTED TO A POWER SOURCE OR WHILE CONNECTED TO A FUEL SOURCE GAU GFH CH 18K Larson Electronics LLC...

Page 9: ...w air for ventilation and combustion Spiderwebs can also appear during periods of inactivity Be sure to inspect the heater before each use to look for any such obstructions Be sure to keep the air pas...

Page 10: ...or broken 3 Loose or disconnected igniter wire 4 Broken igniter wire 1 Properly position electrode 2 Replace the electrode 3 Tighten or reconnect loose wire 4 Replace igniter wire Heater stops runnin...

Page 11: ...1 2 3 Exploded View GAU GFH CH 18K Larson Electronics LLC Phone 800 369 6671 Fax 903 498 3364 www larsonelectronics com 11 of 11...

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