Video-led explanations of fan operation, selection, testing and system behavior for HVAC and equipment engineers.
A motor that spins while nothing comes out of the vents has a short li...
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Surge is what happens when a fan is pushed too far left on its curve. ...
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A reversed fan still turns, still sounds normal and still draws power,...
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Heat is what kills motors, and almost every overheating case traces ba...
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A fan that runs at one speed regardless of the signal usually has a wi...
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An unbalanced wheel announces itself through vibration at exactly one ...
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Different fan noises come from different physics. A whistle is usually...
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Pitch is the single strongest lever on axial fan performance. Increase...
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Airfoil blades reach the highest static efficiency of any centrifugal ...
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The scroll does half the work in a centrifugal fan, and the cut-off de...
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