Untroma 's ventilation device is extremely quiet and offers maximum efficiency for an excellent indoor climate with fresh air. With a volume flow of 250 m³ per hour, it is ideal for houses, shared apartments and apartment buildings. The side nozzles have a diameter of Ø 160. The expiry of the condensation is located on the bottom of the device; The warm side on the left and the outside to the right. Special requests regarding the arrangement can be specified when ordering. The device is available in two diameters (150 mm or 160 mm). The condensate expiry can be done either below or in the lid (for ceiling assembly). However, we recommend the wall mounting for better derivation of the condensation. Two cross current heat exchangers connected in series ensure maximum energy efficiency. The d.