Fan Engineering Guides

Video-led explanations of fan operation, selection, testing and system behavior for HVAC and equipment engineers.

Fan Wall Controls and Staging: How to Balance Fan Count and Speed
By longwell / September 5, 2026 / Fan Engineering Guides

Fan Wall Controls and Staging: How to Balance Fan Count and Speed

Design a stable fan wall sequence by validating sensors, separating sp...

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How to Measure an Old Fan for Replacement: Fit and Duty Checks
By longwell / September 5, 2026 / Fan Engineering Guides

How to Measure an Old Fan for Replacement: Fit and Duty Checks

Build a useful fan replacement record: identify rigid datums, measure ...

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Fan Guard Selection: Access, Strength and Safety Checks
By longwell / September 4, 2026 / Fan Engineering Guides

Fan Guard Selection: Access, Strength and Safety Checks

Assess fan guards by access routes, opening geometry, strength and saf...

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Fan System TAB: A Practical Testing and Balancing Checklist
By longwell / September 4, 2026 / Fan Engineering Guides

Fan System TAB: A Practical Testing and Balancing Checklist

Plan fan system testing, adjusting and balancing with a clear baseline...

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Roof Curb and Flashing for Exhaust Fans: What to Check Before Installation
By longwell / September 4, 2026 / Fan Engineering Guides

Roof Curb and Flashing for Exhaust Fans: What to Check Before Installation

Coordinate the fan base, structural support and roof flashing before i...

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How to Reduce Duct Static Pressure Without Losing Airflow
By longwell / September 4, 2026 / Fan Engineering Guides

How to Reduce Duct Static Pressure Without Losing Airflow

Find avoidable duct resistance with matched-flow measurements, compone...

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Inline Fan Wiring: Switch, Timer and Humidistat Checks
By longwell / September 3, 2026 / Fan Engineering Guides

Inline Fan Wiring: Switch, Timer and Humidistat Checks

Before wiring an inline fan, separate power from control signals, chec...

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How to Balance Airflow Across a Fan Wall
By longwell / September 3, 2026 / Fan Engineering Guides

How to Balance Airflow Across a Fan Wall

Balance a fan wall with defined airflow targets, repeatable measuremen...

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Backdraft Damper: When You Need One and How to Choose It
By longwell / September 3, 2026 / Fan Engineering Guides

Backdraft Damper: When You Need One and How to Choose It

Check when a backdraft damper is useful, how opening pressure differs ...

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Ducting a Centrifugal Blower Correctly
By longwell / September 2, 2026 / Fan Engineering Guides

Ducting a Centrifugal Blower Correctly

Correct centrifugal blower ducting protects inlet flow, discharge reco...

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