Acoustic louvrers for silencing of ventilation ducts; sound attenuators/silencers for placement in air ducts

Apparatus for lighting, heating, steam generating, cooking, refrigerating, drying, ventilating, water supply and sanitary purposes; air handling units; chillers; heat pumps; indoor climate management system for regulation of ventilation and temperature; supply and extract air diffusers; climate beams for cooling and heating of air; cooling and heating induction units