ventilating damper in the wall

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Barra system — The Barra system is a passive solar building technology developed by Horazio Barra in Italy. It uses a collector wall to capture solar radiation in the form of heat. It also uses the thermosiphon effect to distribute the warmed air through… … Wikipedia
Furnace — For other uses, see Furnace (disambiguation). Industrial Furnace from 1907 A furnace is a device used for heating. The name derives from Latin fornax, oven. In American English and Canadian English, the term furnace on its own is generally used… … Wikipedia
Duct (HVAC) — A round galvanized steel duct connecting to a typical diffuser Fire resistance rated … Wikipedia
Grille — A grille (French word from Latin craticula , small grill) is an opening of several slits side by side in a wall or metal sheet or other barrier, usually to let air or water enter and/or leave but keep larger objects including people and animals… … Wikipedia

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