Month: July 2026

HVLS fan, 5.5 meter six-blade EC unit for warehouse destratification
By longwell / July 7, 2026 / Engineering Case Studies

Moving 7,500 m3/min on 1.5 kW: The Case for Turning Slowly

Seventy-five revolutions a minute sounds like nothing. Across five and...

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Cross-flow impeller showing the upgraded impeller material for a mini-split
By longwell / July 6, 2026 / Engineering Case Studies

We Changed the Material the Customer Specified, and Said Why

Build-to-print means build what the drawing says. It does not mean sta...

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Quiet convector fan, 710mm cross-flow unit rated 29 dB(A)
By longwell / July 6, 2026 / Engineering Case Studies

29 dB(A) at 2200 RPM: Where a Quiet Convector Gets Its Silence

Two thousand two hundred RPM sounds fast. On a 30mm impeller the blade...

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30-inch commercial misting fan with an integrated 45 liter water tank
By longwell / July 6, 2026 / Engineering Case Studies

30-Inch Commercial Misting Fan with a 45L Tank: 155 m3/min

A misting fan is two products in one housing, and the interesting engi...

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LWCD-45350MN-06-14
By longwell / July 6, 2026 / Engineering Case Studies

LWCD-45350MN-06 Cross-Flow Fan for Electronics Cooling

An OEM required a 24V DC cross-flow fan for electronics cabinet coolin...

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Cross-flow impeller produced from high-volume impeller tooling
By longwell / July 6, 2026 / Engineering Case Studies

Designing a Mold So 300,000 Impellers Come Out the Same

At three hundred thousand a year, the design problem is not the impell...

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Cross-flow impeller diameter options at a fixed 520mm length
By longwell / July 4, 2026 / Engineering Case Studies

Three Diameters, One Length, One Chassis

The customer fixed the length at 520mm and asked for three diameters. ...

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High-pressure 40mm fan, tubeaxial DC type for spot cooling
By longwell / July 3, 2026 / Engineering Case Studies

716 Pa From a 40mm Fan, and What 24,000 RPM Costs You

Forty millimetres across, and it pushes harder than fans ten times its...

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Ducted axial fan showing a pipeline fan mounting configuration
By longwell / July 3, 2026 / Engineering Case Studies

We Found an Error in Our Own Datasheet: 286 Pa or 124 Pa

Two of our documents disagreed. The customer would have designed aroun...

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LONGWELL double inlet centrifugal fan
By longwell / July 2, 2026 / Technical Articles

Single Inlet vs Double Inlet Centrifugal Fan: When to Use Each?

In industrial ventilation and HVAC systems, centrifugal fans serve as ...

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