[Isolate Interior from Exterior Air] - This air curtain is not an air conditioner, it won't generate cold and hot air. Air curtain is a powerful fan that forcing a high speed air stream over the entrance to isolate the interior and exterior air environment while blocking 90% of Hot or Cold air, dust, and smoke.
[US Patented Magnetic Switch Controlled Circuit (Patent No. US10584889B2)] - With the door switch installed, automatically turn on the air curtain when the door is open; turn off when door is closed. The door switch is optional; if you do not install the door switch, press the Lo/Off/Hi speed switch to turn on for 8 hours continuously running.
[2 Speeds at Lo/Off/Hi switch] - high speed at 989 CFM, low speed at 824 CFM, noise: 49 to 52 DB. A HI/LO/OFF switch to select High/Low speed. 110V-120V 60Hz. 320W Max, 300W Min.
[Easy Installation] - Refer to Technical Specification User Manual. 1) mount the detachable mounting plate securely. 2)hang the air curtain up. 3) install the optional magnetic switch and connect to the dedicated 2 wires.
[It is 42", compared with those 40"] - Parts, repair or exchange within 1 year. Awoco high quality product reputation and customer service is a guarantee. Overall size: 42” L x 8-1/2” D x 9-1/4” H. Weight: 30.9 LBS. 57” power cord with plug is included. UL listed.