Cant say cause the room was already controlled by a dedicated AC unit. What I can say is the room is WAY cooler now and the AC unit doesn't come on nearly as much as before the cover.
Also you can almost touch the glass before you feel really hot heat, i guess about 3" away would be fair to...
Can Fan 6" would work fine. Also use a IR Cover for the reflector if you can. I put one of these on my sun system 6" w/ 1000 and the results were amazing.
I was looking for this answer too. Thanks. What exactly do u mean "on spot"? I'm trying to make sure I'm good or should I wrap the thing up in IR film.