Video-led explanations of fan operation, selection, testing and system behavior for HVAC and equipment engineers.
Three motor types cover most small fans, and they differ by a factor o...
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Insulation class sets the temperature a winding can survive. Temperatu...
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IP ratings look simple until you need one. Here is what each digit act...
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Air escaping past the blade tips is pure loss, and the gap causing it ...
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Two geometrically identical fans of different sizes do not perform ide...
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FEG rated the fan. FEI rates the selection. That single difference exp...
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A weak run capacitor causes slow starting, low speed and overheating, ...
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Above about 3 kW the choice makes itself, and below 1 kW it usually do...
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A drive will spin almost any induction motor, though that is not the s...
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Speed controllers are not interchangeable, and fitting the wrong type ...
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