Quote:
Originally Posted by lucerne96
I am planning a low heat project now. The plan is to run PEX ALU under a standing seam metal roof, pull off the heat & bring it inside a super insulated building for underfloor heating. Building is R70 roof, R 50 walls, R40 under the slab in Philadelphia, PA area. Double stud wall construction - no thermal bridges. .6 ACH
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Sounds like you're doing it right.
Here is a report that concerns a project that is similar to yours, you might find it very interesting.
Please keep us posted on your progress!
Best.
-AC