Predicting the Performance of Flexible-Duct Systems

Predicting the Performance of Flexible-Duct Systems

Flexible duct is a good product, if used properly. By employing proper construction methods and actually designing duct systems, engineers can create greener buildings.

Humorist Will Rogers once said, "It's not what we don't know that hurts; it's what we know that ain't so."

As engineers, how much of what we know "ain't so"? We rely on information and calculation methods we assume have a firm foundation in reality only to sometimes find they do not. That is what happened in 2005, when, asked by an attorney to investigate the failure of a HVAC system to provide the owner's expected comfort conditions, I revi

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