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GTS HUMIDIFIER LX SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
WARNING
Combustion air quality (list of contaminants)
Sample list of contaminants to be avoided:
The recommended source of combustion air is to use the outdoor air supply. However, the use of indoor air in most applications is
acceptable except as follows:
1. If the furnace is installed in a confined space it is recommended that the necessary combustion air come from the outdoors by
way of attic, crawl space, air duct, or direct opening.
2. If outdoor combustion air is used, there must be no exposure to the installations or substances listed in “3” below.
3. The following types of installation may require OUTDOOR AIR for combustion, due to chemical exposures:
• Commercial buildings
• Buildings with indoor pools
• Furnaces installed in laundry rooms
• Furnaces installed in hobby or craft rooms
• Furnaces installed near chemical storage areas
Exposure to the following substances in the combustion air supply may also require OUTDOOR AIR for combustion:
• Permanent wave solutions
• Chlorinated waxes and cleaners
• Chlorine based swimming pool chemicals
• Water softening chemicals
• De-icing salts or chemicals
• Carbon tetrachloride
• Halogen type refrigerants
• Cleaning solvents (such as perchloroethylene)
• Printing inks, paint removers, varnishes, etc.
• Hydrochloric acid
• Cements and glues
• Antistatic fabric softeners for clothes dryers
• Masonry acid washing materials
General venting (continued)
INSTALLATION