Air curtains are powerful fans that force a high speed air stream over the entrance to isolate the interior and exterior air environment. They consume less energy than an air conditioner. Air curtains are widely installed at the entrances of supermarkets, theaters, hotels, food storage warehouses, residences, etc. They keep flying insects out and conditioned air inside, reducing energy costs.
The magnetic switch can simply be stuck to the middle of door and door frame, no bracket needed. Works easily with most doors and windows. Automatically turn on the air curtain by opening door; shut off the air curtain by closing door.
High speed powerful air blow is ideal for high entrances, in order to better keep flying insects out. Low speed is ideal for offices, restaurants, residential door entrances, and drive-thru windows. This air curtain really pushes a lot of air, the sound is from the high speed air circulation similar to a powerful home fan at the highest speed.