Day: May 13, 2026

A 406mm axial impeller with a D-bore made by a custom mold insert
By longwell / May 13, 2026 / Engineering Case Studies

A New Bore Does Not Need a New Mold, Only an Insert

The blade mold already existed. Only the center had to change, and tha...

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ec fans in hvac ventilation
By longwell / May 13, 2026 / Technical Articles

EC Fans in HVAC Ventilation: Driving the Future of Energy-Efficient Airflow

In today’s fast developing pace, efficiency is paramount in every indu...

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White powder coated weather cowl for an exterior duct termination
By longwell / May 13, 2026 / Engineering Case Studies

Why Paint Was the Wrong Answer for an Outdoor Cowl

The requirement was purely cosmetic. The engineering was entirely abou...

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EC fan replacing a unit limited by shaded-pole motor speed control
By longwell / May 13, 2026 / Engineering Case Studies

You Cannot Put a VFD on a Shaded-Pole Motor

The obvious way to add speed control to an existing AC fan does not wo...

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