Author: longwell

How to Size a Centrifugal Blower (Step by Step)
By longwell / September 18, 2026 / Fan Engineering Guides

How to Size a Centrifugal Blower (Step by Step)

How do you size a centrifugal blower without guessing from maximum air...

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How to Read a Fan Performance Curve to Pick a Fan
By longwell / September 18, 2026 / Fan Engineering Guides

How to Read a Fan Performance Curve to Pick a Fan

How do you use a fan performance curve to select the right fan? This e...

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CFM Calculator: Sizing Airflow for Any Room/Process
By longwell / September 18, 2026 / Fan Engineering Guides

CFM Calculator: Sizing Airflow for Any Room/Process

How much CFM do you actually need? This engineering walkthrough preven...

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Static Pressure Calculation for Duct Systems
By longwell / September 18, 2026 / Fan Engineering Guides

Static Pressure Calculation for Duct Systems

Calculate duct static pressure as a traceable loss ledger—not a guess....

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EC fan for AHU retrofit installed in place of a belt driven centrifugal fan
By longwell / September 18, 2026 / Fan Engineering Guides

How to Choose an EC Fan for AHU Retrofit

Retrofitting an old belt-driven AHU fan with EC technology is one of t...

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Fan Motor Sizing: HP, Voltage & Full Load Amps
By longwell / September 18, 2026 / Fan Engineering Guides

Fan Motor Sizing: HP, Voltage & Full Load Amps

Size a fan motor from the real duty point—not from CFM alone. This wor...

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How Many Fans for a Fan Wall? N+1 Redundancy Explained
By longwell / September 18, 2026 / Fan Engineering Guides

How Many Fans for a Fan Wall? N+1 Redundancy Explained

Calculate fan-wall quantity with a real one-fan-unavailable check—not ...

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Airflow Unit Conversion: CFM ↔ m³/h ↔ L/s
By longwell / September 18, 2026 / Fan Engineering Guides

Airflow Unit Conversion: CFM ↔ m³/h ↔ L/s

Convert airflow without losing a factor of 60. This visual engineering...

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Selecting a Blower for Combustion / Burner Air
By longwell / September 18, 2026 / Fan Engineering Guides

Selecting a Blower for Combustion / Burner Air

A combustion blower cannot be selected from burner kilowatts alone. Th...

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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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