There are some things in life which will never, ever, ever, be used or installed in a living space which I or my family occupy. Any open flame device is one of them, I don't care how safe the mfgr says they are, even with a CO detector installed. They too can fail at the worst times. Secondly, CO is very near the density of regular air, just slightly lighter and will usually rise because it's warm, given off during an incomplete combustion process. Do as you wish, I like to wake up on the green sideof the lawn