In NC we had a huge power outrage over the weekend and tons are still powerless. Ours went out on Friday at 10:30 am and came back on Saturday nigh around 7:00 pm. We use our Mr. Heater Big Buddy and I can't tell ya how happy we are with this. 2 small propane tanks ran it for 9 hours on low and it keep the living room and vivs between 70-74 degrees. I also had the vivs covered with blankets leaving the front uncovered. I just hung beach towels in the doorway to keep as much heat as possible in the living room, plus we have a 20 ft vaulted ceiling so if we would have had the normal 8 ft the living room would have been warmer. I did crack one window about an inch just to let some fresh air in.