ERV Duct Size
Getting ready to install an independently ducted ERV as part of our remodel (3,700sqft), nothing super fancy like a Zehnder, probably this one from Broan
My question is in regards to the duct sizing. I know the trunk lines should be 6in but we will have a couple branch lines that split off to different bedrooms/living room for supply and bathrooms/mudroom for return.
It seems like the short (mostly straight) branch lines could step down to 4in, 6in seems like overkill. The Zehnders for instance seem to use a flexible home run system that looks like they are maybe 2-3in
Should I just not worry about it and use all 6in or does it make sense to step down at the branch lines.
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