A mechanically ventilated roof structure as heat exchanger and solar collector. Mekaniskt ventilerad tekkonstruktion som varemvaxlare och solfangare.

Describes a mechanically ventilated roof structure serving several different purposes. The proposed roof design consists of a hollow beam structure of concrete, insulation, air gap and finally an outer cladding layer of metal sheet or roofing felt. When the air handling equipment is in operation, an airflow is set up through the roof airgap and hollow beam structure, consisting either of external air alone, or of alternating external and exhaust air. This enables:<