| http://www.w3.org/ns/prov#value | - Since the bricks in unused chimneys and parapets don???t benefit from the heat that usually flows through walls, they act as tell-tales. ???You walk around the building, and you notice there is an unused chimney integrated into the exterior wall,??? says Straube. ???So you ask, ???How many years has the chimney been not been in use?
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