Development, construction, assembly of ventilation devices (central and decentralized). Also large devices for fitness studios, office space, sales rooms, social rooms, etc. ... Distribution box DN75-125/6 Central living space ventilation shell construction heat exchanger KWL Uniflex floor grille central ventilation shell construction WRG ventilation system ventilation grille Uniflex air hose DN75 antistatic 50m central ventilation shell construction WRG ventilation Ventilation device 110m³ 12V 20 watt controlled living space ventilation KWL WRG ventilation Distribution box DN75-125/6 Central living space ventilation shell construction heat exchanger KWL Uniflex floor grille central ventilation shell construction WRG ventilation system ventilation grille Ventilation device 110m³ 12V 20 wat.