No power for 8 days. Not very cold, maybe 40's at night in the beginning. I had little fires, trying not to fry the motor and themostats (bought new this season). The last 3 nights the temperature dropped to the low 30's and I knew we would need more heat. I removed the motor and thermostats and heated it up to 450. The old buck got us through. Without the fan its surely not as warm, but it kept us in the 60's! I called the buck dealer, that I bought the motor from, and told them about my idea about removing the motor and tstats to increase the temps, they were actually against it, saying I could ruin the insert. Man, people can't think for themselves. At the point we were at, we would have gladly ruined a $300 30yr old insert to stay warm (if we had to)through the power outage. The dealer in South Carolina, just couldn't understand our need.