Month: June 2026

A 130mm plastic axial impeller made from existing tooling
By longwell / June 30, 2026 / Engineering Case Studies

The Cheapest Custom Part Is the One That Already Exists

Tooling is most of what makes a custom part expensive. Before paying f...

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HRV duct fan in 100mm and 125mm sizes with a shared EC motor
By longwell / June 30, 2026 / Engineering Case Studies

Two Duct Sizes, One Motor: 241 or 270 m3/h for 2 Watts

Same motor, same controller, same housing. Change the impeller and the...

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BESS container cooling fan, 800mm EC axial, rated IP54
By longwell / June 30, 2026 / Engineering Case Studies

Why a Containerised Battery System Skips the VFD

An AC fan needs a drive to modulate. Inside a sealed battery container...

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An 800mm AC axial fan at its rated condenser fan duty point
By longwell / June 30, 2026 / Engineering Case Studies

They Asked for 25,000 m3/h. We Said 21,000 and Explained Why.

Quoting the number they asked for would have won the order and shorten...

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ATEX blower alongside its standard-weight equivalent
By longwell / June 30, 2026 / Engineering Case Studies

The Explosion-Proof Version Weighs Twice as Much

Certification is not a sticker. The explosion-proof motor casing nearl...

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Residential exhaust fan range covering 150mm to 300mm duct sizes
By longwell / June 30, 2026 / Engineering Case Studies

Four Exhaust Fan Sizes for One Product Line

Four sizes, 1,200 units, no development. The interesting decision was ...

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Compact forward-curved AC blower during design-in checks
By longwell / June 30, 2026 / Engineering Case Studies

What to Check When a STEP File Arrives

A 3D model settles whether the fan fits. It says nothing about whether...

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Inline duct fan range used for fan supplier qualification
By longwell / June 30, 2026 / Engineering Case Studies

Qualifying a Fan Supplier Across Four Performance Tiers

Nobody orders 30 units of four different models to build one machine. ...

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Double-inlet forward-curved blower supplied against a superseded fan model
By longwell / June 30, 2026 / Engineering Case Studies

When the Part Number You Have Is No Longer the One We Ship

The model they had was discontinued on paper and unchanged in metal. K...

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LONGWELL
By longwell / June 30, 2026 / Technical Articles

Industrial Centrifugal Blower: High-Static-Pressure Applications Guide

In industrial environments where reliable air movement and high static...

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