Also called an air door, an air curtain from Grainger comes in widths of up to 12 feet, although several can be grouped together for wider entrances. Available air curtains range from multipurpose designs to models for drive-through windows. Recover the air flow with a duct fan installed beneath the floor. For street entrances, consider a baseboard heater to supplement the air curtain heater in cold weather or an air circulator as a supplementary cooling fan when temperatures rise. Shop Grainger for everything you need to put together an energy-efficient air door for your facility.