This video reviews three major principles of fan performance called Fan Laws. These three Fan Laws explain how a fan’s airflow, pressure and power consumption change in response to a change in fan operating speed within certain fixed systems.

A fixed system means no variables in the system are changing that would skew the calculations discussed in this video, such as closing a damper or a blast gate. The formulas discussed in this video should be used as general approximations with an understanding that certain equipment, like dust collectors, do not follow fan laws.

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