Share 'Measuring fresh air intake ducted to a return and no way of measuring from outside.'
I am sure this is a challenge that some of you have faced before:
You have an air handling system with fresh air intake that is ducted into the return and is terminated on the outside in a way that would not allow you to measure it with a flow pan.
My thinking is that there should be a way to measure the air flow by measuring pressure difference between outside and the fresh air duct and perhaps…
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