I just have a general question I have been wondering about: What happens to the airflow when your supply air ductwork is oversized? Say for example, you typically try to maintain a constant 0.1" pressure drop across your ductwork but it's a retrofit job and reusing the existing ductwork gives you a pressure drop of 0.03"? I know when the duct is undersized you get noise problems due to the velocity of the air but what type of problems do you have when the duct is undersized? Thanks for your help!
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