Month: May 2026

industrial blower
By longwell / May 18, 2026 / Engineering Case Studies

ADH-K900 Heavy-Duty Belt-Drive Blower for 30 kW Industrial Retrofits

A 30 kW industrial ventilation retrofit required a heavy-duty blower a...

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Backward curved fan, 190mm 24V DC, for equipment cabinet cooling
By longwell / May 18, 2026 / Engineering Case Studies

Trading 42 Pa for 46 m3/h: Tuning a Fan to a System Curve

We slowed the fan down and it moved more air. That is not a paradox, i...

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Quiet inline duct fan, 100mm plastic EC, rated 28 dB(A)
By longwell / May 16, 2026 / Engineering Case Studies

28 dB(A) From an Inline Duct Fan: Where the Quiet Comes From

A 28 dB(A) rating sells the fan. What actually keeps a grow room quiet...

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Four-speed fan coil motor built for a 50Hz to 60Hz motor conversion
By longwell / May 16, 2026 / Engineering Case Studies

Converting a 50Hz Motor to 60Hz Without Changing the Speed

Run a 50Hz motor on 60Hz and it speeds up 20%. Keeping the speeds iden...

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Jet fan unit for a swimming pool hall with a 25 meter air throw
By longwell / May 15, 2026 / Engineering Case Studies

Throwing Air 25 Meters Across a Swimming Pool Hall

Air throw is what stops a pool hall stratifying. Chlorine is what eats...

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EC fan speed controller with manual knob and 0-10V output
By longwell / May 15, 2026 / Engineering Case Studies

Why a Speed Controller Powered From Mains Beat One Powered by the Fan

Two controllers, same output signal. The difference is where they get ...

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dc cross flow for 3d printing
By longwell / May 15, 2026 / Engineering Case Studies

LWCD-30190MN-07 24V DC Cross-Flow Fan for 3D Printer

An OEM developing a 3D printer required a 24V DC cross-flow fan for hi...

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LWA-Ø385x115-5
By longwell / May 15, 2026 / Engineering Case Studies

LWA-385×115-5 Axial Fan Impeller for Commercial HVAC OEM

An HVAC OEM required a custom 385mm axial fan blade for a new condense...

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longwell LWAC-50610 cross flow fan
By longwell / May 14, 2026 / Engineering Case Studies

610mm Cross-Flow Fan Housing & Impeller for HVAC OEMs

An HVAC OEM required a 610mm motorless cross-flow fan sub-assembly. Se...

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A 172mm axial fan after adding speed control on a third wire
By longwell / May 14, 2026 / Engineering Case Studies

The Third Wire: Why Adding Speed Control Means a New Board

The customer rejected our first proposal, and they were right to. A tw...

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