Captive Aire Architectural Square Top Non-Motorized Gravity Vent (GVS24)

This economy make-up air unit is a non-motorized gravity vent. It is an economical choice when a fresh air intake or pressure relief is needed. Can be used anywhere fresh air is needed to replace exhaust air, commercial kitchens, office buildings, bakeries, laundries, factories, warehouses, foundries, locker rooms, etc. 4400 CFM Against Static Resistance. Galvanized steel construction with a built in bird screen Can be roof or wall mounted. Roof curb/ wall mount bracket not included. Made in the USA.