@drdawg my GH is only 6 x 8 and I'm using a small clip on fan- and opening the vents in the ceiling (hoping some air flow is still there even though covered with the solar cover). Today it was sunny so I left the door all the way open. Put the clip on fan on a stool right in front of the door to draw in air. I haven't done that part for 4-5 days because it's been too cool, but I've kept the fan circulating even with the door closed.
