Apparatuses for heating, refrigerating, drying and ventilating, namely, diffusers, air conditioning and heating installations; Ceiling diffusers, Linear slot diffusers, Long throw jet nozzles, Floor diffusers, Ventilation valves for air conditioners; ventilation fan accessories, namely, a panel on a diffuser for manipulating the angle of air venting from air ventilation ductwork; ventilation fan accessories, namely, Air supply grilles, Linear grilles, Linear floor grilles, Return grilles, Transfer grilles, External grilles, Expanding transfer grilles; Accessories for ducts of metal for ventilating, air conditioning and heating installations, namely, dampers, mounting frames, and plenum boxes; ventilation apparatus, namely, Terminal units with HEPA filter, namely, plenum boxes with high-efficiency air filters; Dampers, namely, Air volume dampers for ducts, Constant air volume dampers, Pressure dampers, Variable air volume dampers, all being control devices used in air ducts to regulate the flow of air and enable one to set and maintain a constant pressure in an aerobic duct network; ventilation fan accessories, namely, Motorized damper for grilles, Motorized plenum box for grilles, Motorized plenum box for diffuser, Motorized damper for ducts; ventilation fan accessories, namely, Adjustable pressure dampers for ducts; dampers, namely, Rectangular fire dampers, Circular fire dampers, all being control devices used in air ducts to regulate the flow of air; air conditioning installation, namely, active chilled beams and air/water induction terminal units that simultaneously provide the supply, thermal treatment and diffusion of supply air, to set internal conditions at the desired comfort levels; all the above expressly excluding goods pertaining to the food processing industry