This design includes a covered-plate collector and a heat storage, both combined into an outside wall. The collector is an air-space covered outside by clear corrugated fiberglass sheeting (Filon, Excelite or equal), and backed on the inside by black-painted concrete blocks. The heat storage is the concrete block wall. Some research suggests that collector efficiency may be increased by up to 20% by adding black aluminum or fiberglass flyscreen midway between the transparent cover and the blocks.
Solar
Ventilation Wall Leaflet (Metric)
Solar Ventilation
Wall Leaflet (Imperial)
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