blower door
 n.— «Before any work is done, an assessor is sent to each home to conduct a detailed examination using an infrared camera and what is known as a “blower door”—essentially an airtight door with an inset fan—to locate leaks and hot or cold spots.» —“Big funds for weatherization program” by Nathaniel Zimmer Herald News (Joliet, Illinois) Mar. 21, 2009. (source: Double-Tongued Dictionary)

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