A blower door is a variable speed fan, mounted in a doorframe, used to pressurize and depressurize a house to measure air leakage. Many air leaks and drafts are easy to find because they are easy to feel — like those around windows and doors. But holes hidden in attics, basements, and crawlspaces are usually bigger problems.
A certain amount of fresh air is needed for good indoor air quality and there are specifications that set the minimum amount of fresh air needed for a house.
If you are concerned about how tight your home is, South Salem Plumbing can measure your home's actual leakage. If your home is too tight, a fresh air ventilation system may be recommended.
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