Month: May 2026

EC axial fan with a 710mm impeller for an air-cooled chiller
By longwell / May 23, 2026 / Engineering Case Studies

EC Axial Fan Replacement That Cut Power by a Third

The customer asked for a copy. We proposed something that did not fit,...

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EC centrifugal blower for a commercial ventilation unit
By longwell / May 22, 2026 / Engineering Case Studies

EC Centrifugal Blower for Commercial HVAC: 1236 m3/h

The more efficient impeller lost this one. When the cabinet length is ...

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Cold weather condenser fan, 630mm, for an air-cooled chiller
By longwell / May 21, 2026 / Engineering Case Studies

Surviving -30C Is a Grease Problem, Not a Motor Problem

Surviving +60C is a motor problem. Surviving -30C is a grease problem,...

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oxygenation blower
By longwell / May 21, 2026 / Engineering Case Studies

LWHPF Aquaculture Oxygenation Blower Use Cases

An aquaculture OEM required a portfolio of oxygenation blowers up to 3...

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HVLS fan for destratification in a large warehouse space
By longwell / May 21, 2026 / Engineering Case Studies

HVLS Fan Sizing for a Warehouse: 2.0m, 2.5m or 3.0m

Same motor, three diameters, wildly different coverage. Choosing betwe...

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AC circular duct fans from 100mm to 315mm for commercial ventilation
By longwell / May 21, 2026 / Engineering Case Studies

Seven AC Circular Duct Fans Qualified for One OEM Range

Seven models, two materials, one supplier. The interesting part is why...

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longwell fan engineering cases
By longwell / May 21, 2026 / Engineering Case Studies

LONGWELL Fans for 43,500 m³/h Agricultural & Commercial Ventilation

A system integrator required technical data for 18 different fan model...

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HVAC ventilation accessories including controllers, grilles and dampers
By longwell / May 21, 2026 / Engineering Case Studies

HVAC Ventilation Accessories on One Order: 12 Part Numbers

Twelve part numbers, over 1,800 pieces, one purchase order. Nothing he...

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best fan type
By longwell / May 21, 2026 / Technical Articles

Best Fan Types for Ventilation Systems

Ventilation systems play a vital role in maintaining air quality, regu...

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AC axial fan range from 250mm to 800mm with panel mount and guard
By longwell / May 21, 2026 / Engineering Case Studies

Seventeen AC Axial Fans, 250mm to 800mm, for One OEM Range

Seventeen models, one series. Covering a whole product family from a s...

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