American Dryer Corp. Super AD-30 - Manual (Page 20)

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Illus. C (refer to the previous page {page 15}) shows the minimum cross-section area for horizontal multiple
dryer venting. These figures must be increased in proportion if the main duct run from the last dryer to where
it exhausts has numerous elbows or is unusually long.
IMPORTANT: For extended duct work runs, the cross-section area of the duct can only be increased
to an extent. For extended duct work runs, a professional HVAC firm should be
consulted for proper venting information.
The maximum length of venting from the last dryer to where it exhausts...
Vertical venting must not exceed 25 feet - this calculation compensates for the use of a maximum of three (3)
elbows including the two (2) elbows creating the 180º (turned down
ward) outside outlet protection.
IMPORTANT: No more than four (4) dryers maximum should be connected to one (1) main
common duct with a vertical run.
NOTE: Distance between dryer single ducts being connected to the main common duct must be a
minimum of 31-3/8" (dryer width).
Duct work should be laid out in such a manner where allowances are made at rear area of the
dryer for removal of rear service panels or guards.
Illus. D shows the minimum cross-section area for vertical multiple dryer venting. These figures must be
increased in proportion if the main duct run from the last dryer to where it exhausts has numerous elbows or is
unusually long.
IMPORTANT: For extended duct work runs, the cross-section area of the duct can only be increased
to an extent. For extended duct work runs, a professional HVAC firm should be
consulted for proper venting information.
V
ERTICAL
V
ENTING
I
LLUS
. D