Blower Door Test
What Is An Air Leak?
Houses leak air because of the difference between indoor and outdoor air pressure. Imagine your house as a hot air balloon. The biggest pressure differences are high and low in a building. Holes in these areas typically leak more air than holes in the middle. Warm air rises and leaks out any unsealed areas at the top of the building. Leaks inward tend to be at the bottom of the structure, pulling in cool air. We test for these air leaks using the blower door test.
How Does it Affect Me?
What Is a Blower Door Test?
The blower door test places a home under a known pressure and then measures how much airflow is required to maintain the pressure difference between indoors and outdoors. The tighter the house, the less air the blower door must move to maintain a given pressure.