Modern ventilation units offer numerous possibilities for more comfortable and healthier living. Wall-mounted, window and facade ventilators with heat recovery, sound absorption or healthy filter functions provide a natural environment of well-being. Our ventilation units can be integrated flexibly and discreetly into the element, into the facade or into the outside wall. Even practically invisible, depending on the device. Because high air throughput and sound absorption are not a question of size, but of the interior structure.