The apparatus used to conduct diagnostic evaluations of building envelope airtightness is essential for identifying air leakage pathways. This specialized instrument typically consists of a calibrated fan, a pressure gauge, and a mounting system designed to temporarily seal a doorway. By inducing a pressure differential between the interior and exterior of a structure, airflow through cracks and penetrations in the building’s shell can be measured and quantified, offering valuable insight into its overall energy performance.
Accurate measurement of air leakage is vital for improving building energy efficiency, enhancing occupant comfort, and preventing moisture-related problems. Reductions in uncontrolled air exchange can lead to significant energy savings by minimizing heating and cooling loads. Furthermore, controlling airflow helps to mitigate the risk of condensation within wall cavities, preventing mold growth and structural damage. Its use has become increasingly prevalent as building codes and energy efficiency standards have grown more stringent.