Dexter Laundry SWD EXPRESS - Dryer (On-Premise) - Manual (Page 9)

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Installation of several dryers, where a main discharge duct is necessary, will need the following
considerations for installation (see Figure 3). Individual 6 in. (152 mm) exhaust ducts from the
each dryer should enter main discharge duct at a 45 degree angle in the direction of discharge air
flow.
NOTE: Never install the individual ducts at a right angle into the main discharge duct.
The individual ducts from the dryers can enter at the sides or bottom of the main discharge
duct. Figure 3 indicates the various round main duct diameters to use with the individual
dryer ducts. The main duct can be rectangular or round, provided adequate air flow is
maintained. The total exhausting (main discharge duct plusduct outlet from the dryer)
should not exceed the equivalent of 14 ft. (4.5 m) and two elbows. The diameter of the
main discharge duct at the last dryer must be maintained to exhaust end.
NOTE: A small diameter duct will restrict air flow; a large diameter duct will reduce air velocity
- both contributing to lint build up. An inspection door should be provided for periodic clean-out
of the main duct.