Engineering Case Studies

Application requirements, product choices and engineering project stories from LONGWELL.

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By longwell / April 9, 2026 / Engineering Case Studies

Custom Centrifugal Fan Mounting Hardware for HVAC Units

We changed the centrifugal fan mounting hardware to male-female stando...

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longwell-wi-6948623418-project
By longwell / April 8, 2026 / Engineering Case Studies

Commercial Air Curtain Blower Wheel for Wide Spans

An OEM needed a rigid air curtain blower wheel to span 873 mm. We used...

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longwell-wi-6948627599-project
By longwell / April 8, 2026 / Engineering Case Studies

A 500mm EC Exhaust Fan Retrofit That Drops Power to 200W

Review a real ec exhaust fan retrofit for a 24/7 production line. See ...

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By longwell / April 3, 2026 / Engineering Case Studies

Designing a 60Hz AC Axial Fan for -30C Outdoor Cabinets

Learn how we engineered a custom 60hz ac axial fan with cold-rolled st...

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By longwell / April 3, 2026 / Engineering Case Studies

Sizing a Commercial Roof Exhaust Fan for Facility Airflow

Learn how to size a commercial roof exhaust fan. We match big centrifu...

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longwell-wi-6935667693-project
By longwell / April 2, 2026 / Engineering Case Studies

125mm EC Mixed Flow Fan Engineered for 100 Pa Pressure

Discover how we built an ec mixed flow fan to hit 150 m3/h at 100 Pa. ...

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longwell-wi-6935098557-project
By longwell / April 1, 2026 / Engineering Case Studies

115V AC Centrifugal Fan with 190mm and 225mm Round Capacitors

See how we engineered a 115v ac centrifugal fan with custom round capa...

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longwell-lwfe3g180-092ds-02-pr
By longwell / April 1, 2026 / Engineering Case Studies

Metal EC Centrifugal Fan for 1730 m3/h HVAC Delivery

See how we balanced 1730 m3/h of airflow against a strict 63 dB(A) noi...

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longwell-wi-6935125311-project
By longwell / April 1, 2026 / Engineering Case Studies

Engineering a 1585mm Replacement Impeller for a Dry Cooler

See the exact specs for replacing a 1585mm dry cooler fan impeller on ...

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longwell-wi-6935162654-project
By longwell / April 1, 2026 / Engineering Case Studies

A Split AC Indoor Fan Engineered for 61C Extreme Cooling

Review the engineering steps behind this split ac indoor fan project, ...

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