QE Air Curtains are ideal, easy to install, and functional units for your door/entrance. This is a low maintenance product which reduces energy consumption and costs. Each curtain can be used at door heights of up to 9 feet and include a metal powder coated finish which is corrosion resistant. Excellent way to minimize dirt, dust, fumes, and prevent flying insects from intruding. Each unit includes a remote control, Low Temp Threshold: 14° F / -10° C, 3 speed natural wind, door switch wiring (attached to power cord), and up to 24 hours of continuous use. Are individually packaged and boxed.