How can you identify air leaks during an energy audit?

Using a blower door test or visual inspection is a highly effective method to identify air leaks during an energy audit. A blower door test involves installing a fan in an exterior door frame to create a pressure difference between the inside and outside of the building. This pressure difference allows auditors to detect air leaks by observing where air is being drawn into or out of the building. When combined with visual inspection, which may include checking for gaps, cracks, and improperly sealed joints, this method provides a comprehensive view of the building's air integrity.

This approach is preferred because it is both quantitative and qualitative, allowing for precise measurements of air leakage as well as a physical assessment of potential problem areas. In contrast, other options like installing new insulation or replacing old windows do not directly identify existing leaks; rather, they may address problems after they have been identified. Measuring temperature fluctuations can indicate energy loss but lacks the direct approach necessary for pinpointing specific locations of air infiltration. These methods do not provide the necessary thoroughness for identifying and quantifying air leaks specifically, which is crucial during an energy audit.