HVAC Systems

Fans are among the largest energy consumers inside HVAC systems — in AHUs, fan coils, fresh-air units and terminal ventilation. Articles here map fan roles across HVAC equipment, compare fan types per application and quantify the savings from demand-based control.

direct drive fan vs belt drive fan
By longwell / June 4, 2026 / News

Direct Drive vs Belt Drive Fan: Performance Comparison Guide

Industrial fans play an important role in HVAC systems, warehouses, da...

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best fan type
By longwell / May 21, 2026 / News

Best Fan Types for Ventilation Systems

Ventilation systems play a vital role in maintaining air quality, regu...

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LWA-Ø385x115-5
By longwell / May 15, 2026 / Engineering Cases

LWA-385×115-5 Axial Fan Impeller for Commercial HVAC OEM

An HVAC OEM required a custom 385mm axial fan blade for a new condense...

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longwell LWAC-50610 cross flow fan
By longwell / May 14, 2026 / Engineering Cases

610mm Cross-Flow Fan Housing & Impeller for HVAC OEMs

An HVAC OEM required a 610mm motorless cross-flow fan sub-assembly. Se...

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ec fans in hvac ventilation
By longwell / May 13, 2026 / News

EC Fans in HVAC Ventilation: Driving the Future of Energy-Efficient Airflow

In today’s fast developing pace, efficiency is paramount in every indu...

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Deep-Dive--An-HVACR-Engineer-s-Guide-to
By longwell / April 13, 2026 / News

Deep Dive: An HVACR Engineer’s Guide to Evaluating True Cross Flow Fan Quality

During the design and procurement phases of modern HVACR (Heating, Ven...

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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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Fan-Selection-for-HVAC-Systems--Advance
By longwell / April 1, 2026 / News

Fan Selection for HVAC Systems: Advanced Engineering Guide & Technical Specifications

Fan Selection for HVAC Systems: Advanced Engineering Guide & Techn...

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By longwell / March 30, 2026 / Engineering Cases

Longwell LWEA Series: High-Performance Centrifugal Exhaust Fans for HVAC & Ventilation Systems

Engineered for HVAC and ducted ventilation, Longwell's LWEA series cen...

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By longwell / March 25, 2026 / Engineering Cases

40mm Cross-Flow Fan & PTC Heater Integration for OEMs

Longwell's 40mm cross-flow fan and integrated 2500W PTC heater modules...

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