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Ducting requirements
Recommended
Use only for short-run
installation
Weather hood type
4” (10.2 cm)
2.5” (6.4 cm)
No. of 90° elbows
Rigid
Rigid
0
80 ft. (24.4 m)
74 ft. (22.6 m)
1
68 ft. (20.7 m)
62 ft. (18.9 m)
2
57 ft. (17.4 m)
51 ft. (15.5 m)
3
47 ft. (14.3 m)
41 ft. (12.5 m)
NOTE
* Use a 4-inch (10.2 cm) diameter rigid aluminum or galvanized steel duct.
If you integrate the dryer’s vent system with an existing exhaust system, make sure:
• The exhaust system meets all applicable local, state, and national regulations.
• Not to use a flexible plastic duct.
• To regularly check and clean all lint buildup from inside the existing ducts.
• The duct is not kinked or crushed.
• The exhaust hood damper opens and closes freely.
Manometer measurements
The static pressure in any exhaust system must not exceed 0.83 inches of water column or be less than 0.
Note that these values are measured with the dryer running with a manometer presented to the exhaust
duct that connects to the dryer. The dryer tumbler must be empty and lint filter clean.
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