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D. FRESH AIR SUPPLY REQUIREMENTS
Air supply (make-up air) must be given careful consideration to assure proper performance of each dryer. An
unrestricted source of air for 800 cfm (22.65 cmm) is necessary for each dryer. An unrestricted air entrance from
the outdoors (atmosphere) of a minimum of 1-1/2 square feet (0.14 square meters) 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 openings are acceptable. However, they must be set
up in such a manner that the make-up air is distributed equally to the dryers. The dryer must be installed with
provisions for adequate combustion and make-up air supply.
EXAMPLE: For a bank of eight (8) dryers, a total make-up air opening of 12 square feet (1.11 square meters) is
required. Two (2) openings measuring 2 feet x 3 feet (0.61 meters x 0.91 meters), (6 square feet
[0.56 square meters]) are acceptable.
Allowances must be made for remote or constricting passageways or where dryers are located at excessive
altitudes or predominately low pressure areas.
IMPORTANT: Make-up air must be provided from a source free of dry cleaning fumes.
Make-up air contaminated by dry cleaning fumes will result in irreparable damage
to motors and other dryer components.
NOTE: Component failure due to dry cleaning fumes VOIDS THE WARRANTY.