WEATHER HOOD
OR SWEEP ELBOW (No cap or screen)
PARAPET
MAIN COLLECTOR DUCT
WALL 
HORIZONTAL DUCT
•Main collector duct should be sized according to specifications shown below.
180˚ SWEEP
ELBOW (No cap or screen)
DUCT | 24" MIN. |
| |
MAIN COLLECTOR | (60.96 cm) |
ROOF |
D039IE3A
VERTICAL DUCT
Number | Minimum Diameter of | Minimum Diameter of |
of Dryers | Horizontal Collector Duct | Vertical Collector Duct |
|
|
|
1 stack | 7 inch (17.8 cm) | 8 inch (20.3 cm) |
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|
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1 stack | 8 inch (20.3 cm) | 9 inch (22.9 cm) |
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|
|
2 stacks | 9 inch (22.9 cm) | 10 inch (25.4 cm) |
|
|
|
2 stacks | 10 inch (25.4 cm) | 11 inch (27.9 cm) |
|
|
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3 stacks | 11 inch (27.9 cm) | 12 inch (30.5 cm) |
|
|
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3 stacks | 12 inch (30.5 cm) | 13 inch (32.6 cm) |
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|
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4 stacks | 12 inch (30.5 cm) | 14 inch (35.6 cm) |
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|
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4 stacks | 13 inch (32.6 cm) | 15 inch (38.1 cm) |
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|
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5 stacks | 14 inch (35.6 cm) | 15 inch (38.1 cm) |
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|
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5 stacks | 14 inch (35.6 cm) | 16 inch (40.6 cm) |
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|
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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.
30 | 504524 |