A Duct Leakage Test, also known as a duct leakage measurement or duct leakage testing, is a procedure conducted to assess the amount of air leakage occurring within a building’s ductwork system. The test involves pressurizing or depressurizing the duct system and measuring the airflow rate to determine the extent of leakage.
During a Duct Leakage Test, the ductwork system is sealed off, and a fan or blower is used to either pressurize or depressurize the system. By creating a pressure differential, any air leakage points within the ductwork become evident. The airflow rate required to maintain the desired pressure difference is measured using specialised equipment, such as a duct leakage tester.
The results of the Duct Leakage Test are typically reported as a percentage of the total airflow through the system, known as the duct leakage percentage. This value indicates the proportion of air leaking from the ductwork relative to the total airflow.
Duct Leakage Testing is important for several reasons. It helps identify areas of air leakage within the duct system, which can contribute to energy losses, reduced HVAC system efficiency, and compromised indoor air quality. By detecting and addressing these leaks, energy efficiency can be improved, air distribution can be optimised, and comfort levels can be enhanced.
Duct Leakage Testing is commonly performed during construction, as part of HVAC system commissioning, or during energy audits and retrofits. It allows for the identification of ductwork sealing issues and helps guide appropriate remedial actions to improve overall system performance.
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