Last week, I was talking to my dad who was talking about my grandparents heat being electric and what would happen if the power went out for an extended period and how we would help protect them and yada yada. Anyways, he mentioned seeing a heater called the "Mr. Heater Big Buddy" at *gasp* Wal-Mart for $119. http://www.mrheater.com/product.aspx?catid=41&id=116 Well, I started thinking about it and after hearing he was going to buy them one in case of emergency, I decided that since my heat was electric, that I was in the same boat. So, after doing a couple hours research online, I went ahead and pulled the trigger on one and a couple of the little 16.4 oz Coleman propane tanks. I took it home and decided that I would try it out. Well, I was very pleasantly surprised because this bad boy puts off some heat! On top of that, it can run, on low, for 110 hours on one tank. It has one tank for each burner, so that's 220 hours of heat! It's approved for indoor use and claims to be almost 100% efficient. It has a couple safeguards built into it. If it tips over, it shuts off. Also, it has an oxygen sensor so if it gets too low in the area you are using it in, it shuts off then as well. Anyways, I just wanted to share this nice little product with you all here. It seems to be well made and should last a long time. Hope this helps someone.