Solar Hot Air Collectors
Solar hot air collectors typically consist of a glass panel with black interior attached to the outside of a south-facing wall. Solar radiation heats the air in the panel, which travels into the building through a duct at the top of the collector. Return air from the building enters the collector at the bottom. Hot air collectors are often used to heat a single room, but can be connected to a building’s ductwork to provide heat to multiple spaces.
Importantly, most hot air collectors will only provide significant heat from mid-morning to early afternoon, a time when many residents are not home. The penetrations for solar hot air collector ducts may be susceptible to air and rain leaks if not sealed tightly. Tight dampers are also required to keep excess heat out in summer.Last updated: September 15, 2017 at 13:06 pm