Should returns be installed in encapsulated crawl space and attic?
I have recently moved into our new construction home and as I have slowly learned about conditioning crawl space and attic I have questioned if my contractor did it correctly. As far as the crawl space it initially had no air movement. (Completely sealed). During inspection the county inspector advised 1 or 2 air vents to be installed off of the HvAC’s main runners in the crawl space and attic.
And here is my question.. should I close or tape the vents that the inspector had us install? Or install return vents so not only it blows fresh air but returns it too.
Would a simple floor and ceiling vent equalize the pressures and return some of this air?
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