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Multiple Vented Installation
Whenever possible, each stack dryer tumbler should have an individual short
straight exhaust duct.
Whenever possible, each dryer tumbler in multiple installations should have
individual short straight exhaust ducts.
If an individual or dual duct is not possible, install a long tapered main connector
duct. A duct exceeding 20” (508 mm) should be a custom duct designed by a
professional heating and air conditioner (HVAC) contractor.
Individual tumbler ducts should enter the main connector duct at a 45º angle in
the direction of exhaust air flow.
The diameter of the main connector duct progressively increases as more dryers
are added. (refer to illustration).
Back pressure of ducting system should not exceed 0.3 inch water column
(.75 mbar) when all dryers are operating. Use a manometer for tests. More
detailed ducting information can be obtained directly from your heating and air
conditioning (HVAC) contractor or dealer.
Single dryer
Multiple dryers
Testing
Multiple vents
