m Ransley wrote:

Again, YOU made the claims. It's your job to prove them.
And again, where were you when they handed out Logic :-)

Proving "No skylight is good enough to gain heat on an average December day
in Chicago" would seem to require that you have a list of every skylight on
earth, including those yet unbuilt :-)

I've already shown how to build a net heat gainer with multiple layers.

Nick