Effectively maintaining indoor air quality, Vevor's 40 in. Commercial Air Curtain prevents the entry of external hot and cold air, smoke, and exhaust gas. Operating at high (1667 CFM) and low (1490 CFM) speeds, it features a convenient speed control button. The power-saving pure copper motor and versatile dual switch options ensure compatibility with various door types. Installation is simple with the included accessories, suitable for door heights up to 137.8 in., and operates quietly at under 60 dB, perfect for entrances of supermarkets, malls, and office buildings.
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