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A furnace room is a room in a building for locating a furnace and auxiliary equipment. Such a room minimizes the visual impact of the furnace, pipes and other gear. A modern compact furnace for a single family home can readily fit into a small closet. However, care must be exercised to provide adequate ventilation as the exterior of the furnace unit emits a significant amount of heat. An unheated attached garage can be an ideal furnace room, as the exterior heat from the furnace will warm and dry the garage. However, care must be taken to prevent air leakage from the garage into the house via pathways, either through or around the furnace and ductwork. Such air leakage could act to transport potentially dangerous contaminants from the garage into the main body of the house. In the picture, the airflow is from bottom to top, with an electronic air filter on the bottom, followed by a natural gas high efficiency or condensing furnace (98% efficient) in the middle, and air conditioning coils on top.
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