The Swiss company Zehnder is the largest European manufacturer of ventilation units with heat recovery for family houses and apartments with a long tradition. Zehnder develops and supplies not only ventilation units, but a complete system with highly hygienic air distribution system and design grilles and valves. Adjusted, easily combinable elements enable an installation in top quality for the highest customer satisfaction. Individual offers tailored to customer requirements. Technical proposals free of charge, with prices and detailed list of material included.