WEATHER HOOD
OR SWEEP ELBOW (No cap or screen)
PARAPET
MAIN COLLECTOR DUCT
WALL 
MAIN COLLECTOR DUCT
180˚ SWEEP
ELBOW (No cap or screen)
24" MIN.
(60.96 cm)
ROOF
D039IE3A
•Main collector duct should be sized according to specifications shown below.
Number | Minimum Diameter of | Minimum Diameter of |
of Dryers | Horizontal Collector Duct | Vertical Collector Duct |
|
|
|
2 | 7 inch (17.8 cm) | 8 inch (20.3 cm) |
|
|
|
3 | 8 inch (20.3 cm) | 9 inch (22.9 cm) |
|
|
|
4 | 9 inch (22.9 cm) | 10 inch (25.4 cm) |
|
|
|
5 | 10 inch (25.4 cm) | 11 inch (27.9 cm) |
|
|
|
6 | 11 inch (27.9 cm) | 12 inch (30.5 cm) |
|
|
|
7 | 12 inch (30.5 cm) | 13 inch (32.6 cm) |
|
|
|
8 | 12 inch (30.5 cm) | 14 inch (35.6 cm) |
|
|
|
9 | 13 inch (32.6 cm) | 15 inch (38.1 cm) |
|
|
|
10 | 14 inch (35.6 cm) | 15 inch (38.1 cm) |
|
|
|
11 | 14 inch (35.6 cm) | 16 inch (40.6 cm) |
|
|
|
NOTE: Main collector duct should be equipped with an auxiliary fan that can maintain the duct airflow at a minimum of 1200 feet (366 m) per minute. If you do not have a fan, clean the main collector duct at least twice a year.
34 | 504509 |