Dayton exhaust / supply ventilators are designed for roof-mounted exhaust or supply of clean air in warehouses, factories, offices and manufacturing plants. These units feature heavy-gauge, galvanised steel construction for durability and hinged hoods with bird screens for proper access to motors and drives while protecting open vents from birds and other contaminants. The complete assembly includes housing, fan and drive packages (shipped separately) to customise as per requirement. Their belt-drive design offers flexibility in fan speeds and 6-blade, galvanised steel propellers move large air volumes at low static pressures (0.125 inches or less), thereby reducing sound levels. Choose from an array of these supply / exhaust vents, available in fan speeds ranging from 659 to 1046 rpm.