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Manometers

Manometers are the brain of a blower door test. First, a manometer is used with a blower door fan to lower the air pressure inside a house relative to the outside, usually a 50 Pascal difference. Once a pressure difference is achieved, a manometer measures the baseline volume of air leaking to the outside through the building exterior. Once the air leaks are sealed, a manometer is used to measure the improvement, a step that’s frequently necessary to earn a state subsidy for air-sealing work.