Manual Vent Control
With linear gear drive
Lift heavy vents or skylights with this precision-built vent control. Smooth running gears lift and hold vent at any opening up to 13" that you select. Change as needed. Recommended for occasional use venting. (Use automatic controls for daily venting.) All rustproof materials. Max. lift 150 lbs.
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Good for hard-to-reach vents and for vents that are restricted in how much they can open. The Manual Vent Opener is also recommended as a backup for Exhaust Systems.