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-7075113607-project
By longwell / August 17, 2026 / Engineering Case Studies

120mm Cross Flow Fan: 50,000 Unit OEM Assembly Project

Read how we engineered a custom 120mm cross flow fan assembly deliveri...

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longwell-wi-7073897421-project
By longwell / August 14, 2026 / Engineering Case Studies

Designing a 48mm Neoprene Hub for High-Volume HVAC

See how we designed a cross flow fan rotor hub with chloroprene rubber...

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Heat exchanger axial fans built as a pilot production run of fifty
By longwell / July 31, 2026 / Engineering Case Studies

Fifty Units First: What a Pilot Batch Is Actually For

The drawings were approved and the samples passed. The customer still ...

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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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longwell-wi-6985032542-project
By longwell / May 8, 2026 / Engineering Case Studies

Retrofit a 450mm AC Centrifugal Fan for 70°C Heat

Learn how we retrofitted a 450mm AC centrifugal fan to deliver 4500 m3...

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longwell-wi-6983541870-project
By longwell / May 6, 2026 / Engineering Case Studies

900 m3/h Cross Flow Fan Replacement for New Energy Systems

Read how we engineered a 900 m3/h cross flow fan replacement. See the ...

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longwell-wi-6975592248-project
By longwell / April 21, 2026 / Engineering Case Studies

Transformer Cooling Fan Replacement for 220V Dry-Type Units

See how we built a 220V transformer cooling fan to replace old GFDD420...

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longwell-lwfe3g160-092ss-02-pr
By longwell / April 20, 2026 / Engineering Case Studies

Solving an EC centrifugal fan replacement with a 150W cap

Learn how we engineered an EC centrifugal fan replacement to match an ...

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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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