The SolarWall® unglazed Transpired Solar Collector (uTSC) is a highly efficient solar air heating system that harnesses the sun’s energy to heat fresh, outdoor air for buildings. Installed as an ‘additional skin’ to a building’s southerly facing façade, the SolarWall® collector consists of either a pre-coated steel external profile, or flat aluminium rainscreen panel, which is perforated with thousands of tiny holes uniformly spaced cross the full face of the collector.

As solar radiation is absorbed by the SolarWall®, its outer surface is warmed and this solar heat conducts to the thermal boundary layer that lines the outer surface of the collector. This heated boundary layer of air is then drawn through the perforations into a specifically designed air cavity that is created between the SolarWall® collector and the original elevation behind. From here, the fresh, solar heated air can then be introduced directly into the building as ventilation air, or ducted directly into the buildings HVAC system, where it can be used as a pre-heater for the main heating system.