Automatic Vent Opener Replacement Cylinder hairy dryer holder The analogies drawn between art

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Automatic Vent Opener Replacement Cylinder hairy dryer holder The analogies drawn between artThis product is a replacement cylinder to fix an automatic vent opener for the GardenHouse greenhouse. Automatic vent operators on the roof and base vents require no electricity or batteries. The vent operator contains a paraffin (wax) that expands when the temperature reaches about 65F, pushing the vent open to its fully opened position at about 85F. The operators springs draw each vent closed as it cools and the paraffin contracts. It is adjustable