Patent ID: 7032588

Claim:
An apparatus for pre-heating ventilation air for a building, comprising: a first sunlight-absorbent collector panel on said building, the panel being exposed to ambient air and defining a first air collection space between itself and said building, the first sunlight-absorbent collector panel having a plurality of air inlet openings to allow the ambient air to pass through the openings to the first air collection space; a second sunlight-absorbent collector panel on said building, adjacent said first sunlight-absorbent collector panel, the second sunlight-absorbent collector panel defining a second air collection space between itself and said building, the second sunlight-absorbent collector panel having a plurality of air inlet openings to allow air to pass through the openings to the second air collection space; a glazing covering said second sunlight-absorbent collector panel and defining an intermediary air flow chamber between itself and said second sunlight-absorbent collector panel, said intermediary air flow chamber being in communication with said first air collection space to receive air therefrom, said air inlet openings in said second sunlight-absorbent collector panel providing communication between said intermediary air flow chamber and said second air collection space; an air outlet from said second air collection space into said building for air flow therethrough; a fan in communication with said air outlet for moving air from said second air collection space into said building, through said air outlet.