Author: longwell

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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longwell-wi-7073135475-project
By longwell / August 13, 2026 / Engineering Case Studies

Engineering 3 Sizes of Industrial Floor Fans

We designed three new industrial floor fans. Read how we balanced size...

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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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longwell centrifugal blower
By longwell / August 11, 2026 / Engineering Case Studies

LWDD7-5-C-EC-002 Centrifugal Blower for Air Filtration Systems

A 220V variable-speed EC centrifugal blower pushing 1980 m³/h at 317 P...

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AC vs EC fan variants of a cross-flow platform built for one order
By longwell / August 10, 2026 / Engineering Case Studies

We Proposed All-EC. The Customer Was Right to Refuse.

Consolidating on one motor platform would have simplified our producti...

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