This is our dining room window this morning. What you see isn't condensation- it's ice on the inside of the window. This window and one other were deliberately deprived of their storm windows because Jamey wanted to see what our wood stove could do in very cold temperatures (it got down to around zero last night).
Despite the ice inside the house, we stayed very comfortable thanks to adding wood a couple times throughout the night. In case you're curious, very comfortable to us is mid 70's in the stove (living) room (in the middle of the night) with all the other rooms being cooler. With plenty of attention, I've been able to keep the living room around 80 today (rest of the house cooler, of course) - a treat compared to what our oil heat would have been able to do for our old house if we were still using it.
For any of you on the fence about wood heat...you'll love it. We certainly do.
All of you who live way north are amazing and much braver than I. How cold was it where you live last night?