Fan inlet boxes help manage airflow into the fan, reduce turbulence, and can support transitions or directional changes in ductwork. Why use an inlet box on a fan?
Don’t Install your Industrial Fan in a Vacuum: Know your Inlet Air Density
If the conditions surrounding your application are standard, then you might not need to worry about calculating the inlet air density before selecting your fan. That being said, you need to do some extra calculations with non-standard conditions, as they can have a big impact on your fan sizing and design.
