Quote:
Originally Posted by jamesqf
But that's not primarily from radiation loss. It's conduction + convection: the window glass conducts heat to the outside, inside air right next to the glass becomes cold, cold air is more dense so it flows towards the floor, drawing warmer air from the room up to the glass to be cooled in turn...
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Also frost insulates better than ice which insulates better than glass
So if your window is frosted it is increasing its R value a bit.
Also condensing liquid releases heat.