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D. Fresh Air Supply
Air supply (make-up air) must be given careful consideration to assure proper and safe performance of each
dryer. An unrestricted source of air of 550 cfm is necessary for each tumbler. An unrestricted air entrace from
the outdoors (atmosphere) of a minimum of 2 square feet is required for each dryer. This area must be enlarged
if louvers or registers cover the opening. It is not necessary to have a separate make-up air opening for each
dryer. Common make-up air is distributed equally to the dryers. However, they must be set up in such a manner
that the make-up air is distributed equally to the dryers. For example, for a bank of eight (8) dryers, a total make-
up air opening of 16 square feet is required. Two (2) openings 2’ by 4’ (16 square feet) are acceptable.
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 contaminated by dry cleaning solvents will result in irreparable damage to
motors and dryer components.
IMPORTANT: Make-up air openings should not be located near duct work exhaust outlets. If the
make-up air opening(s) are too close to the exhaust outlet, lint and fumes may be drawn
back into the dryer through these openings.
NOTE: Component failure due to dry cleaning solvent fumes will VOID THE WARRANTY.