Specifications

035-17377-000 REV A (0201)
Unitary Products Group 11
Excessive exposure to contaminated combustion
air will result in safety and performance related
problems. To maintain combustion air quality, the
recommended source of combustion air is the out-
door air supply. The outdoor air supplied for com-
bustion should be free from contaminants due to
chemical exposure that may be present from the
following sources.
• Commercial buildings
• Indoor pools
• Laundry rooms
• Hobby or craft rooms
• Chemical storage areas
The following substances should be avoided to
maintain outdoor combustion air quality.
• Permanent wave solutions
• Chlorinated waxes and cleaners
• Chlorine based swimming pool cleaners
• 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
• Anti-static fabric softeners for clothes dryers
• Masonry acid washing materials