When organizing the airflow in a room during trial adjustments, it is necessary to measure the air volume of the vents. Similarly, during system airflow trials and adjustments, vent air volume must also be measured. Since the airflow is in a natural diffusion state, directly measuring the wind speed at the vent opening is inaccurate for the following reasons: the airflow from the regulating louvers is unstable; the airflow tends to diffuse outward. Therefore, measurements should be conducted as follows:
(1) Use wooden boards or styrene boards to create false vents. As vent sizes vary, the false vents can either be adjustable in size or custom-made according to the specific vent being measured.
(2) The significance of measuring the wind speed at the false vent lies in the fact that after the airflow passes through the straightened false vent, its flow becomes more stable. This measured wind speed is closer to the actual wind speed.
(3) The length of the false vent is generally above 50 cm.
(4) However, the false vent should be easy to install, remove, and support to increase the efficiency of the measurement process.
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Technical training content provided by the Beijing Carrier Air Conditioning Repair Center.
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Carrier Air Conditioning Repair Answer: How to measure the wind speed at room vents?