Month: July 2026

A 400mm axial blower built with a custom motor winding for 2800 RPM
By longwell / July 2, 2026 / Engineering Case Studies

9,000 m3/h on 350 Watts: Rewinding for 2800 RPM

High speed, high airflow, tight power budget, single-phase supply. Thr...

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AC centrifugal blower for an outdoor packaged air handling unit
By longwell / July 2, 2026 / Engineering Case Studies

AC Centrifugal Blower Rated -40C to +60C for an Outdoor AHU

Anyone can quote a temperature range. Holding one from -40C to +60C co...

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A 92mm IP68 fan with fully encapsulated motor electronics
By longwell / July 2, 2026 / Engineering Case Studies

Sealing a Fan Completely Also Stops It Cooling Itself

The customer liked the airflow and not the sealing. Fixing the sealing...

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Compact fan coil blower, 194mm cross-flow, galvanized steel housing
By longwell / July 1, 2026 / Engineering Case Studies

Fifteen Watts, 44 dB(A): A Fan Coil Blower Sized Honestly

Small, quiet, cheap and reliable. Nothing about this project is dramat...

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10 common ec fan specification mistakes
By longwell / July 1, 2026 / Technical Articles

EC Fan Specifications: 10 Common Mistakes to Avoid

Selecting the wrong EC fan can cost your countdown and excess noise. E...

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Intake and exhaust fan pair, 300mm axial, for cleaning equipment
By longwell / July 1, 2026 / Engineering Case Studies

One Machine, Two Fans, Opposite Directions

Reversing an axial fan by swapping the wires does not work. Direction ...

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Fan guard grille fitted to an 820mm cross-flow fan for an air curtain
By longwell / July 1, 2026 / Engineering Case Studies

A Finger Guard That Does Not Cost You Airflow

Every guard costs airflow. The design question is how little you can p...

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