VENTECH’s main production of air diffuser and air grille are as follows: 4 way square ceiling diffuser, round air diffuser, swirl diffuser, ceiling replacement diffuser, jet nozzle diffuser, eyeball diffuser, linear slot diffuser, linear bar grille, return air grille, double deflection grille, supply air grille, air louver, weather louver, external valve, access door, air damper, opposed blade damper, backdraught damper, volume control damper, VCD, flexible duct, etc.