Hi all, I live in the city and considering replacing my old (not functional) gas fireplace with either ventless gas logs or a wood burning insert. As the wood option is a lot more expensive, I am considering the gas. It seems like it would heat at least part of the house if the electricity fails. I don't know much about the natural gas system, though, and how fragile it is. Does anyone have any thoughts to help me sort out what would be the best way to prepare in case the grid goes down and I'm not leaving my house? thanks!