The way we control the speed of fan motors or pump motors has tremendously changed in the past two decades with the introduction of variable-frequency drives (VFDs), aka variable-frequency controllers ...

Occasionally, significant breakthroughs are a matter of simply applying new thoughts to old solutions - looking at the situation with a new and clearer vision. Today's economic realities force all ...

A prototype fan coil unit has achieved such amazing energy savings that its developers fear for their credibility We’re worried engineers won’t believe our data,” frets Terry Farthing, technical ...