The topic of motors and motor control techniques is wide and varied. Part one of this two-part article will cover the principles of alternating-current (AC) motor operation and control.  

Proper building ventilation has been a basic need in modern building performance for decades, yet, somehow, it remains one of the greatest difficulties for sustainable modern building design. 

One of the easiest-to-create commissioning process deliverables is also one of the most valuable to the building owner/operator. I am talking about a master equipment list (MEL).