INSTALLATION INSTRUCTIONS
Determining vent length
NOTE: Check periodically to ensure that the outside exhaust hood is not blocked.
The maximum length of the exhaust system depends upon:
•The type of vent (heavy or flexible metal).
•The number of elbows (90° turns) used.
To determine maximum vent length:
1.See the Exhaust Hood Type chart that matches your hood type for the maximum vent lengths you can use.
Do not use vent runs longer than specified in Exhaust Hood Type chart. Exhaust systems longer than specified will:
•Shorten the life of the dryer.
•Reduce performance, resulting in longer drying times and increased energy usage.
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| EXHAUST HOOD TYPE | |||||||||
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No. of |
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90° |
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| 21⁄2" |
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turns |
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| 4" |
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| 4" |
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| Heavy Metal Vent | ||||||||||||
| Maximum length |
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0 | 36 ft |
| 36 ft | 26 ft | |||||||||
1 | 26 ft |
| 26 ft | 16 ft | |||||||||
2 | 16 ft |
| 16 ft | 6 ft | |||||||||
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| Flexible Metal Vent | ||||||||||||
| Maximum length |
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0 | 28 ft |
| 28 ft | 22 ft | |||||||||
1 | 18 ft |
| 18 ft | 12 ft | |||||||||
2 | 8 ft |
| 8 ft | 2 ft | |||||||||
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2.Determine the number of elbows you will need.
3.In the column listing the type of metal vent you are using (heavy or flexible), find the maximum length of metal vent on the same line as the number of elbows.
Exhaust hood 
Flexible metal vent or heavy metal vent
Elbow
20
