What function does the clear flow sensor perform in blower door testing?

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The clear flow sensor plays a critical role in blower door testing by ensuring accurate air pressure measurements. During the testing process, it detects the differential air pressure across the blower door and provides real-time data that is essential for calculating the building's airtightness. Because precise airflow and pressure readings are crucial for understanding how much air leaks through the building envelope, the functionality of the clear flow sensor directly impacts the reliability of the test results.

While other functions such as measuring wind direction, calculating airflow rates, or maintaining blower door stability may be relevant in the overall context of testing, they are not the primary function of the clear flow sensor. This sensor is specifically focused on ensuring that the measurements taken reflect the true conditions inside and outside the building, which is vital for assessing performance against building codes and standards.

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