Fan Engineering Guides

Video-led explanations of fan operation, selection, testing and system behavior for HVAC and equipment engineers.

Mounting a Fan to Kill Vibration (Isolators)
By longwell / September 2, 2026 / Fan Engineering Guides

Mounting a Fan to Kill Vibration (Isolators)

Fan vibration isolator installation starts with diagnosis. Learn how s...

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Fan Inlet/Outlet Clearances Done Right
By longwell / August 29, 2026 / Fan Engineering Guides

Fan Inlet/Outlet Clearances Done Right

Fan installation clearance is more than a distance. Learn how inlet fl...

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Dryer Booster Fan Not Turning On — Fix
By longwell / August 28, 2026 / Fan Engineering Guides

Dryer Booster Fan Not Turning On — Fix

A dryer booster fan that will not start needs a whole-path diagnosis. ...

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Ceiling exhaust grille with subtle illustrative sound ripples in a dry residential bathroom
By longwell / August 26, 2026 / Fan Engineering Guides

Bathroom Fan Grinding Noise — Diagnose & Fix

A grinding bathroom fan is a symptom, not a verdict. Trace the grille,...

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How-to-Seal-Ducts---Cut-Leakag
By longwell / August 24, 2026 / Fan Engineering Guides

How to Seal Ducts & Cut Leakage

Duct sealing begins by identifying function, not by choosing tape or m...

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Whole-House-Fan-Not-Working---
By longwell / August 24, 2026 / Fan Engineering Guides

Whole House Fan Not Working — Troubleshoot

A whole-house fan is not an attic ventilator or an HVAC circulation bl...

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Regenerative blower with side channel housing beside a centrifugal blower
By longwell / August 22, 2026 / Fan Engineering Guides

Centrifugal vs Regenerative (Side Channel) Blower

A regenerative blower recirculates air through the impeller many times...

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High-temp fan with a shaft cooling wheel and isolated bearings
By longwell / August 22, 2026 / Fan Engineering Guides

High-Temp Fan vs Standard Fan Materials

Heat attacks a fan from three directions at once: the wheel, the beari...

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Ducted and ductless ventilation arrangements compared in a kitchen
By longwell / August 22, 2026 / Fan Engineering Guides

Ducted vs Ductless Ventilation

Ductless systems filter and return air rather than removing it. That w...

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Single inlet and double inlet centrifugal fan wheels compared
By longwell / August 21, 2026 / Fan Engineering Guides

Single Inlet vs Double Inlet Centrifugal Fans: What are different?

A double inlet wheel takes air from both sides, roughly doubling airfl...

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