Why Is Air Sealing Important?
Imagine that you areThe first concept to help fully understand the importance of air sealing is the stack effect. Hot air rises, especially in the winter. Air will continue to rise through the home as long as there are penetrations to move through. For every cubic foot of air that leaves the home, there has to be another cubic foot of air to take its place. The stack effect causes air to escape out of the top of the home (i.e. ceiling, attic, and roof). This air will be pulled into the house through gaps/cracks in the windows, basement, crawlspace, foundation vents, and plumbing penetrations towards
There are penetrations or air leakage points throughout an entire home. These penetrations are predominantly found in the attic, windows, plumbing penetrations, chimney, and HVAC duct boots. While the stack effect is pushing air up the home, these air leakage points allow the air to escape. This phenomenon explains the drafts that may be felt along hallways, kitchens, and living spaces. The penetrations also drive your energy costs through the roof (pun intended). They make your HVAC system work extra hard to keep your home conditioned.
Air Changes Per Hour
FUN FACT: The average home experiences 6 air changes per every hour. What are air changes per hour (ACH)? Simply put, air changes represent the number of times that a home loses its volume of air in a given hour. Excessive ACH may shorten the lifespan of your HVAC while increasing the draftiness of your home. This results in expensive heating and cooling costs. As discussed above, air leakage points are directly correlated with ACH within your home.
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