blower door
n.β Β«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”βessentially an airtight door with an inset fanβto locate leaks and hot or cold spots.Β» ββBig funds for weatherization program” by Nathaniel Zimmer Herald News (Joliet, Illinois) Mar. 21, 2009. (source: Double-Tongued Dictionary)