Awoco 36" Elegant 2 Speeds 900 CFM Unheated Indoor Air Curtain with an Easy-Install Magnetic Door Switch

Air curtain is NOT an air conditioner. Air curtain is a powerful fan that forcing a high speed air stream over the entrance to isolate the interior and exterior air environment. It consumes less energy than an air conditioner. Air curtains are widely installed at the entrance doors/gates of supermarket, theater, hotel, food storage warehouse, residential, etc. It keeps the flying insects out and keeps conditioned air inside, reduces energy costs.
The magnetic switch can be simply sticked to the middle of door and door frame, no bracket needed. Works easily with most doors and windows. Automatically turn on the air curtain with door open; shut off the air curtain with door close.
High speed powerful air blow is for regular 7 to 8 feet office, restaurant or residential door entrance entrance, Low speed is for quiet area entrance or drive-thru window. This air curtain is quieter than the super power FM15 series because it generates 30% to 50% less air flow. The sound is from the high speed air circulation as same as a powerful home fan at the highest speed.

Why magnetic switch is better than micro switch?
The traditional mechanical plunger micro switch has to be installed accurately for the door panel or bracket push the rod on the switch, it has wear and tear issue for long time use. The 110VAC high voltage directly applies on the micro switch will cause sparks inside the micro switch which lower the life of usage too.
The magnetic switch is much easier for installation, no restriction on the types of the door or windows. 12VDC low voltage on the magnetic switch connection is much safer. And no mechanical touch for longer usage.