What is a common test for verifying duct leakage?

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Verifying duct leakage is crucial for maintaining energy efficiency and ensuring proper heating and cooling in a building. A duct leakage test using a calibrated flow hood or blower door is commonly employed for this purpose.

This method involves using specialized equipment to measure the air flow in and out of the duct system under controlled conditions. A calibrated flow hood allows for the direct measurement of air flow at the register outlets, while a blower door test creates a pressure differential within the building, enabling the identification of leaks in the ductwork and overall envelope of the structure.

This approach provides quantifiable data on how much air is escaping from the ducts, thus allowing for assessment of the efficiency of the HVAC system and identifying areas that may require sealing or repair. The accuracy and effectiveness of this method make it a standard practice in the industry for verifying duct leakage.

Other methods, while useful for various assessments, do not provide the same level of quantitative data on leakage specifically. For example, a duct pressure test using a manometer can measure pressure within the ducts but does not directly quantify leakage. A visual inspection can identify obvious damage or disconnections, but it lacks precision in measuring airflow and leakage rates. Duct airflow measurement can show how much air is moving through the system but

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