Technical Articles

Fan selection, airflow, controls, installation and application knowledge.

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 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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LONGWELL centrifugal fan
By longwell / August 11, 2026 / Technical Articles

Centrifugal HVAC Fans: Complete Ordering Guide

Centrifugal fans are widely used in AHUs, ventilation equipment, and H...

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air circulator vs industrial fan
By longwell / August 7, 2026 / Technical Articles

Air Movement Solutions: From Air Circulators to Industrial Fans

Air movement is essential in an HVAC system to circulate air and regul...

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longwell duct fan with speed contoller
By longwell / August 6, 2026 / Technical Articles

Duct Fan with Speed Controller: How Variable Speed Improves Efficiency?

Traditional duct fans always operate at full speed, which results in u...

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duct fan vs exhaust fan
By longwell / August 5, 2026 / Technical Articles

Duct Fan vs Exhaust Fan: What are the Differences?

Effective ventilation is essential for maintain indoor air quality, co...

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LONGWELL factory
By longwell / July 31, 2026 / Technical Articles

Fans for HVAC OEM: How to Build Long-Term Supply Partnerships?

In HVAC systems, fans are one of the most crucial components. Differen...

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LONGWELL top 5 bathroom exhaust fan
By longwell / July 30, 2026 / Technical Articles

Top 5 Exhaust Fans for Bathrooms in 2026: Quiet & Energy Efficient

The bathroom is usually damp and hot, especially those without windows...

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what is bldc motor
By longwell / July 29, 2026 / Technical Articles

What is BLDC (Brushless DC) Motor?

Various types of motors are used in commercial or industrial fans, eac...

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Tube Axial Fan vs Tube Axial Fan
By longwell / July 28, 2026 / Technical Articles

Vane Axial Fan vs Tube Axial Fan: Which Handles Higher Pressure?

Axial fans are widely used in ventilation systems to convey large amou...

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