Month: August 2026

ventilation fan CE UL ETL RoHS
By longwell / August 18, 2026 / Technical Articles

Ventilation Fan Certifications: CE, UL, ETL, RoHS – What Each Means?

Performance specifications like airflow, static pressure, and noise le...

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How-to-Replace-Fan-Motor-Beari
By longwell / August 18, 2026 / Fan Engineering Guides

How to Replace Fan Motor Bearings?

Bearing replacement is not the first answer to every noisy fan motor. ...

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longwell-lwaa6d800s-7myb-15-pr
By longwell / August 18, 2026 / Engineering Case Studies

Harsh Climate Condenser Cooling with an 800mm AC Axial Fan

Learn how we built an 800mm AC axial fan to push 27,089 m3/h at 185 Pa...

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longwell-wi-7075113607-project
By longwell / August 17, 2026 / Engineering Case Studies

120mm Cross Flow Fan: 50,000 Unit OEM Assembly Project

Read how we engineered a custom 120mm cross flow fan assembly deliveri...

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By longwell / August 17, 2026 / Engineering Case Studies

24V PWM Blower: 365 m3/h Cooling in a 760x80mm Profile

Learn how we engineered a 24V DC cross flow fan with custom PWM speed ...

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longwell heat pump ventilation fan
By longwell / August 15, 2026 / Technical Articles

Heat Pump Ventilation Fan: How to Choose EC Fans for Heat Pump Systems?

A heat pump is used to heat pipes. Heat pump systems have nowadays bec...

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longwell-wi-7073870371-project
By longwell / August 14, 2026 / Engineering Case Studies

1000mm EC Cross Flow Fan: 1600 m³/h Airflow at 80 Pa

Need an EC cross flow fan for tight spaces? We show how a 1000mm unit ...

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IE1 vs IE2 vs IE3 vs IE4 vs IE5
By longwell / August 14, 2026 / Technical Articles

IE Motor Efficiency: IE1 vs IE2 vs IE3 vs IE4 vs IE5 Compared

One of the most important measurement for electric motor is its effici...

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longwell-wi-7073897421-project
By longwell / August 14, 2026 / Engineering Case Studies

Designing a 48mm Neoprene Hub for High-Volume HVAC

See how we designed a cross flow fan rotor hub with chloroprene rubber...

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LONGWELL duct fan
By longwell / August 13, 2026 / Technical Articles

6-Inch vs 8-Inch Duct Fan: Choosing the Right Size

In commercial, industrial, and agricultural ventilation systems, a duc...

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