Solar Furnace solar air heater, vented soffit tips advice from a pro<br /><br />My Net Zero House<br /><a href="http://www.youtube.com/watch?v=BNmjwBPLB2c" target="_blank" rel="nofollow">http://www.youtube.com/watch?v=BNmjwBPLB2c</a> <br /><br />My Passive House<br /><a href="http://www.youtube.com/watch?v=sZqpDybeWLk" target="_blank" rel="nofollow">http://www.youtube.com/watch?v=sZqpDybeWLk</a><br /><br />Solar air heating is a solar thermal technology in which the energy from the sun, solar insolation, is captured by an absorbing medium and used to heat air.[1] Solar air heating is a renewable energy heating technology used to heat or condition air for buildings or process heat applications. It is typically the most cost-effective out of all the solar technologies, especially in commercial and industrial applications, and it addresses the largest usage of building energy in heating climates, which is space heating and industrial process heating.<br />Solar air collectors can be commonly divided into two categories:[2]<br />Unglazed Air Collectors or Transpired Solar Collector (used primarily to heat ambient air in commercial, industrial, agriculture and process applications)<br />Glazed Solar Collectors (recirculating types that are usually used for space heating)<br />Functioning in a similar manner as a conventional forced air furnace, systems provide heat by recirculating conditioned building air through solar collectors - Solar thermal collectors. Through the use of an energy collecting surface to absorb the sun's thermal energy, and ducting air to come in contact with it, a simple and effective collector can be made for a variety of air conditioning and process applications.<br /><br /><br />SPF Solar Air Heat Collector<br />A simple solar air collector consists of an absorber material, sometimes having a selective surface, to capture radiation from the sun and transfers this thermal energy to air via conduction heat transfer. This heated air is then ducted to the building space or to the process area where the heated air is used for space heating or process heating needs.<br />Collector types[edit]<br />Due to varying air-ducting methods, collectors are commonly classified as one of three types:<br />a) through-pass collectors,<br />b) front-pass,<br />c) back pass,<br />d) combination front and back pass collectors.<br />...<br /><a href="https://www.youtube.com/watch?v=VS2k75qcPi4" target="_blank" rel="nofollow">https://www.youtube.com/watch?v=VS2k75qcPi4</a>