Hi, My husband and I are in the design phase with an architect in Washington, PA (hour south of Pittsburgh..Stiller country). We are attempting to build a solar passive home with SIPS. Our architect has been great. He admitted early on to not having done many solar passive homes, which is expected, Pittsburgh is not necessarily a hub for efficient home design. So I've been doing alot of the calculations (which is fine by me, makes me feel useful).