The message is possibly controversial, yet quite simple: Selection is all about fan total pressure. The article is a bit more complex, with discussion of what the author sees as confused logic, accompanied by multiple illustrations to back up his premise. Take a look for yourself - when it comes to proper selection methodology, the pressure is on.
Why was one floor’s laboratory ventilation failing to keep up, when it was even the closest floor to the rooftop fans? Some system sleuthing led two engineers to a fitting conclusion. Read more stories in May Issue 2017.