Technical Articles

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

Industrial centrifugal fan in a high ambient unattended equipment application
By longwell / September 20, 2026 / Technical Articles

UL 507 2026 Update Buyer Checklist for High Ambient and Unattended Fans

UL 507 changed in 2026. Use this buyer checklist to define high ambien...

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Single-Fan-vs-Fan-Grid--Which-One-Fits-
By longwell / September 18, 2026 / Technical Articles

Single Fan vs Fan Grid: Which One Fits Your Project?

Continuous and consistent airflow is very essential for HVAC projects,...

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10-Best-Ventilation-Fan-Manufacturers-2
By longwell / September 16, 2026 / Technical Articles

10 Best Ventilation Fan Manufacturers 2026

The ventilation industry is experiencing a transformation. Manufacture...

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Ziehl-Abegg-Alternative-Guide--Drop-In-
By longwell / September 15, 2026 / Technical Articles

Ziehl-Abegg Alternative Guide: Drop-In EC Fan Replacements by LONGWELL

When HVAC, ventilation equipment manufacturers, and OEMs evaluate fan ...

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fan selector results 33 models 8000 m3h 600 pa
By longwell / September 12, 2026 / Technical Articles

Fan Selection Software vs. an Online Fan Selector: What Engineers Need in 2026

What a browser-based fan selector must do for engineers and OEM design...

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EC-Motor-vs-DC-Motor-vs-AC-Motor--Effic
By longwell / September 11, 2026 / Technical Articles

EC Motor vs DC Motor vs AC Motor: Efficiency & Cost Comparison

Electric motor-driven systems account for approximately 65% of industr...

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IE5-Motor-Benefits--EC-vs-AC-Induction-
By longwell / September 10, 2026 / Technical Articles

IE5 Motor Benefits: EC vs AC Induction Fans

Motor technology has become a critical factor in fan selection with th...

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Centrifugal-Fan-for-Air-Handling-Units-
By longwell / September 9, 2026 / Technical Articles

Centrifugal Fan for Air Handling Units (AHU): Performance Parameters

In modern HVAC systems, air handling units (AHUs) are responsible for ...

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Cooling-of-Electronic-Equipment--Method
By longwell / September 7, 2026 / Technical Articles

Cooling of Electronic Equipment: Methods, Challenges, and Best Practices

As industry transitions towards electrification, automation, and digit...

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ebm-papst-Alternative-Guide--How-to-Sel
By longwell / September 7, 2026 / Technical Articles

ebm-papst Alternative Guide: How to Select the Right EC Fan Replacement?

The recent Madison Air acquisition of ebm-papst has brought attention ...

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