Major renovation of a building under monument protection in Engen. An intriguing challenge of its own kind for DIEKLIMAWELT Germany. The owner of the property intended to operate a bar with live music and permission to smoke, in a way that the smoke may be hardly noticeable by any patron. At the same time all restrictions and regulations regarding the monument protection had to be considered. As the solution DIEKLIMAWELT Germany installed a Ventilation unit with WRG right under the roof using hundred percent outside air. The unit was shipped in parts and had to be lifted and installed on site, with all incoming air and exhaust being channelled through the roof. The project was designed to allow at a later point the addition and installation of refrigeration with a direct evaporation system. All ventilation ducts were installed as visible “instruments”.