Fan Selection

Correct fan selection starts from the duty point — airflow plus system resistance — then checks efficiency zone, speed, noise, voltage, protection class and mounting. Articles here walk through step-by-step selection for each fan type and flag the specification mistakes that cost efficiency later.

Aluminum-vs-Steel-vs-Composite
By longwell / August 19, 2026 / Fan Engineering Guides

Fan Impeller Material Selection: Aluminum, Steel, or Composite?

Aluminum, steel and composite are broad material families—not complete...

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longwell heat pump ventilation fan
By longwell / August 15, 2026 / News

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 duct fan
By longwell / August 13, 2026 / News

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 greenhouse ventilation fan
By longwell / July 8, 2026 / News

How to Choose Greenhouse Ventilation Fan?

In modern facility agriculture, the stability of the greenhouse enviro...

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centrifugal fan for data center cooling
By longwell / June 26, 2026 / News

Centrifugal Fan for Data Center Cooling: Key Specs & Selection

When the power density of a single cabinet jumps five times or even hi...

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ec fan selection guide
By longwell / June 18, 2026 / News

The Complete EC Fan Selection Guide: 7 Engineering Steps

EC fans have become the preferred choice for modern HVAC, industrial v...

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data center selection
By longwell / June 12, 2026 / News

Data Center Fan Selection Guide: How to Choose the Right EC Fan?

Today’s procurement engineer isn’t just selecting an EC backward-curve...

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metal fan blades vs plastic fan blades
By longwell / April 30, 2026 / News

Metal Fan Blades vs. Plastic Fan Blades: How to Choose for Industrial Cooling?

If you’re sourcing fans for industrial or commercial applications, one...

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-strong-How-to-Select-the-Right-Centrif
By longwell / April 8, 2026 / News

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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Engineering-HVAC-Fan-Efficiency--A-Tech
By longwell / April 2, 2026 / News

Engineering HVAC Fan Efficiency: A Technical Guide to System Design and Selection

Engineering HVAC Fan Efficiency: A Technical Guide to System Design an...

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