Zonal Pressure Testing, also known as zone pressurization testing or compartmentalization testing, is a diagnostic procedure used to evaluate the airtightness and pressure differentials between different zones or compartments within a building. It involves measuring the pressure differences across various zones to assess the effectiveness of compartmentalization and air barrier systems.
During a Zonal Pressure Test, the building is divided into separate zones or compartments using temporary or existing barriers. A blower door or fan is used to create pressure differentials between the zones by pressurising or depressurising them individually. Pressure measurements are taken to determine the airflow and pressure relationships between the zones.
The test results provide valuable information about the airtightness of the building envelope, the effectiveness of compartmentalisation measures, and the overall air pressure dynamics within the different zones. This data helps identify areas of air leakage, evaluate the performance of air barrier systems, and guide improvements in energy efficiency and indoor air quality.
Zonal Pressure Testing is particularly useful in multifamily buildings, commercial spaces, or large buildings with multiple zones or compartments. It allows for the evaluation of fire separations, the verification of compartmentalisation strategies, and compliance with building codes and standards.
By conducting Zonal Pressure Testing, building professionals can identify areas of concern, make informed decisions regarding air sealing measures, optimize HVAC system performance, and enhance the overall energy efficiency and comfort of the building.