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Day: July 20, 2026

900mm dual-speed condenser fan for an air-cooled condenser unit

By longwell / July 20, 2026 / Engineering Case Studies

Dual-Speed 900mm Condenser Fan: 27,089 m3/h on Two Windings

Two speeds without a drive, a controller or any electronics at all. So...

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Forward-curved PTC heater blower for a compact space heater

By longwell / July 20, 2026 / Engineering Case Studies

The Heating Element Is the System Resistance

The customer sent a power figure, a plug type and a picture. No airflo...

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A 250mm condenser fan rated for 30,000 hours L10 bearing life

By longwell / July 20, 2026 / Engineering Case Studies

30,000 Hours Is a Survival Rate, Not a Warranty

Every datasheet quotes an L10 figure and almost nobody reads it correc...

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