Bath fan venting
I have a Panasonic I am now stuck with since I can’t return. I say stick because I do not like the 3” oval outlet. My question is this: will transitioning from the 3” oval to a 4” round, then to a 6” round be beneficial, or will the 3” oval act as a bottleneck and no matter how large my duct is after the fan it won’t matter.
In other words, will a 4” and a 6” round operate the same if the beginning of the run is a 3” oval.
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