... is widely used in ceiling,side wall, sidewall, door, air conditioner application, in broadcast room, hospital, theater,guest room etc ... products as clients' request.Specification and Performances Table for Air Conditioner Grille:Neckpart Windspeed(m/s) 2 3 4 5 ... 1.54 310 1.73 180 * 180 235 1.12 350 1.52 470 1.97 585 2.31 ... diffuser, their performances data are equivalent as well Air Conditioner Grille