6-5
07/02
COMMERCIAL MULTI LOAD DRYERS - MDG30, MC2, PC2, PNA, and MNA
MULTIPLE DRYER (Common) VENTING
HORIZONTAL VENTING
If it is not feasible to provide separate exhaust ducts for each dryer, ducts for individual dryers may be channeled into
a common main duct. Each dryer is provided with a back draft damper. The individual ducts should enter the bottom or
side of the main duct at an angle not more than 45
°
in the direction of the airflow. No more than four (4) dryers
should
be
connected to one (1) main common duct run.
The main common duct may be any shapes so long as the minimum cross-section area is provided. The main duct should
be tapered with the diameter in creasing before each individual 8-inch duct is added (refer to
Illus. C and Illus D
).
Illus. C
Horizontal venting
must not
exceed 20 feet - this calculation compensates for the use of a maximum of only one
(1) elbow which is the outside outlet protection.
NOTE:
Distance between dryer ducts being connected to the main common duct
must be
a minimum of
31-1/8” (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 panels or guards.
