Static Pressure & Airflow

Airflow and static pressure are the two numbers every fan decision hangs on — and the two most often misread. This tag explains CFM/m³h conversion, static vs total vs velocity pressure, duct resistance budgeting and how filters and coils move the operating point over time.

LONGWELL cross flow fan
By longwell / July 24, 2026 / News

What is a Cross Flow Fan?

A cross flow fan is a type of blower designed to provide a wide and un...

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LONGWELL centrifugal fan
By longwell / July 15, 2026 / News

Types of Centrifugal Fan Impellers Explained

In HVAC and industrial ventilation systems, centrifugal fans are widel...

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LONGWELL DUCT FAN
By longwell / July 9, 2026 / News

How to Increase Airflow in Ductwork?

When talking about HVAC, air conditioning is mostly considered. Howeve...

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LONGWELL
By longwell / June 30, 2026 / News

Industrial Centrifugal Blower: High-Static-Pressure Applications Guide

In industrial environments where reliable air movement and high static...

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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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oxygenation blower
By longwell / May 21, 2026 / Engineering Cases

LWHPF Aquaculture Oxygenation Blower Use Cases

An aquaculture OEM required a portfolio of oxygenation blowers up to 3...

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DC Blower
By longwell / May 11, 2026 / Engineering Cases

LWBD43M 19kPa DC Blower for Medical & Precision Airflow

A compact 24V DC centrifugal blower delivering 19 kPa max static press...

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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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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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