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American Dryer Corporation
113549 - 8
C. FRESH AIR SUPPLY REQUIREMENTS
This appliance may only be installed in a room that meets the appropriate ventilation requirements specified in the
national installation regulations.
When the dryer is operating, it draws in room air, heats it, passes this air through the tumbler, and exhausts it out of the
building. Therefore, the room air must be continually replenished from the outdoors. If the make-up air is inadequate,
drying time and drying efficiency will be adversely affected. Ignition problems and sail switch “fluttering” problems
may result, as well as premature motor failure from overheating.
Air supply (make-up air) must be given careful consideration to assure proper performance of each dryer. An
unrestricted source of air is necessary for each dryer. An airflow of 5,300 cfm (cubic feet per minute) (150 cmm
[cubic meters per minute]) must be supplied to each gas dryer and 6,500 cfm (184 cmm) for each steam dryer. As a
general rule, an unrestricted air entrance from the outdoors (atmosphere) of a minimum of 6 square feet (0.56 square
meters) is required for each gas dryer and a minimum of 8 square feet (0.74 square meters) for each steam dryer.
To compensate for the use of registers or louvers used over the openings, this make-up air area must be increased by
approximately thirty-three percent (33%). Make-up air openings should not be located in an area directly near where
exhaust vents exit the building.
It is not necessary to have a separate make-up air opening for each dryer. Common make-up air openings are
acceptable. However, they must be set up in such a manner that the make-up air is distributed equally to ALL the
dryers. The dryer must be installed with provisions for adequate combustion and make-up air supply.
Allowances must be made for remote or constricting passageways or where dryers are located at excessive altitudes
or predominantly low pressure areas.
IMPORTANT: Make-up air must be provided from a source free of dry cleaning solvent fumes. Make-up
air that is contaminated by dry cleaning solvent fumes will result in irreparable damage to the
motors and other dryer components.
NOTE: Component failure due to dry cleaning solvent fumes will VOID THE WARRANTY.
