I'm working on my solar air collector. It has a duct and a manifold
that will made of aluminized polyisocyanurate.
My initial thought was to have the low e surface facing inward, ie
inside the duct and the manifold.
Now I wonder if the air flow and subsequent convective loss will
negate that. I'm thinking air flows will be between 2 and 8 mph for the
duct and manifold (350 CFM).
Any thoughts on this?