"bill"
news:05033e37-c920-43eb-842d-
> Lemme know how that goes, I will be interested to see it.
> Assuming that you can pull r6 average for the box front and back (R2
> on the front and r10 on the back), at a 75 degree temperature
> differential inside to outside,
So you are assuming 0F outside temp? or -5F for most people that I know.