Author: longwell

Circular inline duct fan with a white cylindrical housing
By longwell / April 9, 2026 / Engineering Case Studies

LONGWELL 125mm AC Circular Inline Duct Fan Specification

LONGWELL engineering evaluated requirements and released technical spe...

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Centrifugal fan mounted on a rectangular support frame
By longwell / April 9, 2026 / Engineering Case Studies

Custom Mounting Hardware Design for EC Centrifugal Fan LWBE3G225-092PS-04-48

Engineering modification details for LONGWELL LWBE3G225-092PS-04-48 EC...

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By longwell / April 9, 2026 / Technical Articles

Axial Fan Not Working 10 Common Problems and Solutions

LONGWELL Axial Fan Not Working? 10 Common Problems & Troubleshooti...

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Cross-flow fan assembly with a metal tangential impeller and end-mounted motor
By longwell / April 8, 2026 / Engineering Case Studies

Cross Flow Fan Impeller Technical Drawing Specifications

Technical drawing and specification parameters for plastic and metal c...

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Axial fan with a circular wire guard and metal blades
By longwell / April 8, 2026 / Engineering Case Studies

EC Axial Fan Retrofit Engineering: Model LWEE500(20″)SP-405

Engineering specification for the LONGWELL LWEE500(20")SP-405 EC axial...

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By longwell / April 8, 2026 / Technical Articles

How to Select the Right Centrifugal Fan: An 8-Step Selection Guide

How to Select the Right Centrifugal Fan: An 8-Step Selection Guide Are...

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By longwell / April 7, 2026 / Technical Articles

Rediscovering “External Rotor”: An Underestimated Fan Revolution

In-Depth Analysis of External Rotor Axial Flow Fans Structural Princip...

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By longwell / April 6, 2026 / Technical Articles

Rethinking Ventilation Why Engineers Are Choosing EC Duct Fans

Rethinking Ventilation: Why Engineers Are Choosing EC Duct Fans LONGWE...

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Axial fan with a circular wire guard and metal blades
By longwell / April 3, 2026 / Engineering Case Studies

AC Axial Fan Specifications: LWAA2E200S-7MKW-28 and LWAA2E250S-5MKW-45

Technical specification output for 220V 60Hz AC axial fan models LWAA2...

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Engineering reference photo accompanying this project record
By longwell / April 3, 2026 / Engineering Case Studies

Roof Exhaust Fan Selection for Dual Operating Duty Points

LONGWELL engineering response for dual roof exhaust fan requirements, ...

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