Furr-UP instead of furr-down to include ducts in the envelope?
I’m building a new home in south Louisiana and I’ve been lurking here for a few week soaking up some energy efficiency building techniques.
One of the biggest points I see on here is to include the HVAC system in the insulation envelope. But, that isn’t standard practice in Louisiana for new construction ( as in, NO ONE does it in my area). I get the deer-in-the headlights when I even mention a closet unit with ducts installed in furr downs. This also goes for Framers and Home Designers
So, I was wondering if anyone has ever seen a Furr-UPS (into the attic) instead of a furr down?
I’m a fairly handy guy, So I was thinking I coudl have the HVAC installed the typical Louisiana way, in the attic 🙁 Then, frame up an insulated mechanical room myself, lay the ducts out in straight-ish “raceways” and frame furr-ups branching off my mechanical room. These furr-ups would not ducts buried in insulation, but instead an insulated box around the duct.
I figured I could use rigid foam with sealed seams on the interior face of my furr-ups and then install batts or rockwool on the back side of the rigid foam.
Thanks in advance for tips, opinions and sanity checks.
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