Author: longwell

A 200mm DC axial fan held under a 1050 gram fan weight limit
By longwell / July 28, 2026 / Engineering Case Studies

The Fan Had a Weight Limit Before It Had an Airflow Target

Airflow, pressure, noise, voltage — every order states those. This one...

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LWFE3G200-102SS-02-00
By longwell / July 27, 2026 / Engineering Case Studies

LWFE3G200-102SS-02-00 EC Centrifugal Fan for HVAC

An OEM required a 200mm EC centrifugal fan delivering 700 m³/h at 1000...

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Forward-curved blower housing from low-volume tooling, 150 units a year
By longwell / July 27, 2026 / Engineering Case Studies

A Custom Stamping Die for 150 Fans a Year

Tooling economics usually assume volume. This customer commissioned a ...

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EC condenser fan entering fan standby mode below the 1.2V threshold
By longwell / July 27, 2026 / Engineering Case Studies

Below 1.2 Volts, This Fan Deliberately Stops

Everyone specifies the top of the control range. The bottom of it — wh...

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Split impeller sections and central coupling for a 1200mm cross-flow fan
By longwell / July 27, 2026 / Engineering Case Studies

Twelve Hundred Millimetres of Airflow From Two Pieces

No single impeller extrusion survives 1200mm at speed. The customer ne...

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LWAA4E550S-5MEB-02 axial fan
By longwell / July 27, 2026 / Engineering Case Studies

LWAA4E550S-5MEB-02 AC Axial Fan for HVAC Condensers

Case study on an 8,755 m³/h AC axial fan for HVAC condenser units. See...

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LONGWELL AC axial fan
By longwell / July 25, 2026 / Engineering Case Studies

LWAA4E250S-5MYB-32-00 and LWAA4E300S-5MYB-15-00 AC Axial Fan for OEM Ventilation

An OEM required a modification of standard AC axial fans into a tube-a...

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By longwell / July 25, 2026 / Engineering Case Studies

The Fan Sits Millimetres From a 1000-Watt Heater

Buy a fan and a heater separately and someone still owns the gap betwe...

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Fan filter kit adapting a 120mm axial fan to a 150mm cabinet cutout
By longwell / July 25, 2026 / Engineering Case Studies

The Cutout Is the Requirement, Not the Fan

The customer asked for a 150mm fan that barely exists. What their cabi...

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LWBA for AHU cases
By longwell / July 25, 2026 / Engineering Case Studies

380V AC Centrifugal Fan for AHUs: 695 Pa High-Pressure

Developing a standardized 380V AC backward curved centrifugal fan for ...

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