Over the last month or so you may have seen us using the term “Blower Door Directed Air Sealing.” We can’t take credit for coining it, but we feel like it helps those who are interested in learning about a relatively complicated process grasp the concept as a whole.
Our powerful fan assembly pushes air into buildings at a high rate. This results in a pressure differential between the interior and exterior of the building.
As a weather geek, I like to think of these pressure differentials in and around leaky points of a building like isobars. Some of the windiest days are caused by a high pressure system and a low pressure system abutting one another. Where they meet, there exists an upward motion of air particles. The same concept is present when we install AeroBarrier.
By putting the building under 100 pascals of (high) pressure, AeroBarrier Atoms will “spoil up” and collect on one another around mud sills, sistered framing members, and plumbing/electrical penetrations where the lower pressure exists.
Without the Blower Door Fan, the AeroBarrier Atoms would float around aimlessly before settling on a horizontal surface below. With the Blower Door Fan, AeroBarrier is pushed to all the gaps, cracks, and holes in a building.
To be continued…
