Awoco FM15-BLK Black Super Power 2 Speeds Indoor Air Curtain, UL Certified, 120V Unheated with an Easy-Install Magnetic Switch

[Black Air Curtain, Isolate Interior from Exterior Air] - This unit is an unheated Air Curtain, it does not generate cold or hot air. Air curtain is a powerful fan that creates a high speed air stream over the entrance to isolate the interior and exterior air environment while blocking the entry of dust and smoke. Black colored air curtain, powder coated metal case, easy to clean slim body. [US Patented Magnetic Switch Controlled Circuit (Patent No. US10584889B2)] - 2 pieces of magnets have no direct contact, won’t be damaged by a door slamming. The magnetic door switch installation is much easier than the traditional mechanical plunger switch. 12VDC is safer and no hard wired required. It works even the door closer is not working well, just install at the closer distance while the door is closed. [2 Speeds] - 2 speed super powerful operation. Less power consumption than other industrial air curtains. Adopting the technology of German electrical machinery, it continuously runs for bus