OEM and ODM

OEM, ODM and private label fan programmes compared: who owns the design, tooling and certification, and what each route costs in time and money.

longwell-wi-6974349832-project
By longwell / April 20, 2026 / Engineering Case Studies

Tube Axial Fan M6 Fastener Replacement Project

An HVAC OEM needed new fan motor mounting hardware to fix severe rust ...

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longwell-wi-6968625192-project
By longwell / April 16, 2026 / Engineering Case Studies

Replacing a 380V Cooling Unit with a 1100W EC Axial Fan

See how we matched strict PWM rules and 12V fault logic to replace an ...

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longwell-wi-6955506439-project
By longwell / April 13, 2026 / Engineering Case Studies

Specifying a Drop-In 100x685mm Replacement Impeller

See how we built a replacement metal cross flow impeller for a 100x685...

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longwell-lw2190-64-project-ima
By longwell / April 11, 2026 / Engineering Case Studies

Replacing a 110mm 24V DC Centrifugal Fan in a Compact Enclosure

See how we replaced a legacy 110mm 24V DC centrifugal fan, lowering th...

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longwell-wi-6954170590-project
By longwell / April 10, 2026 / Engineering Case Studies

Replacing a Broken Plastic Rotor for 30 m/s Industrial Air

Learn how an aluminum cross flow impeller solved big balance problems ...

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longwell-wi-6953642920-project
By longwell / April 10, 2026 / Engineering Case Studies

Reversible 900mm Axial Fan: 24,000 m³/h HVAC Replacement

Read how we engineered a reversible 900mm axial fan to replace a 14-bl...

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longwell-wi-6952895469-project
By longwell / April 9, 2026 / Engineering Case Studies

Drop-In Replacement for a 230V Double Inlet Centrifugal Blower

Learn how we engineered a custom double inlet centrifugal blower to re...

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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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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-lwaa17050sm-11-projec
By longwell / March 30, 2026 / Engineering Case Studies

Hardware Rack Retrofit: Sizing a 172mm AC Cooling Fan

This 172mm ac cooling fan project delivers 178 CFM at 230V. Discover w...

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