chap wrote:WoW all this talk of CO2 is worrying me. Although I have a CO2 detector at the top of the stairs and 5 smoke detectors in my house but it still worries me. I have an external chimney on the outside of my house and my harman 3500 furnace is in the basement along with the clean out. My clean out does not have a door on it. I have the clean out plugged with fiberglass insulation. I have not had any problems but would still like others opinions on whether clean out door is necessary instead of the insulation.
Not sure how you have it 'plugged' with insulation, but that does not sound real safe. If you got a sizable explosion from the coal gases it might pop that insulation out like a cork. (Compare to the general rule that stove pipe sections should have 3 screws whenever they are joined together to handle the force)
Also, you MUST get another CO detector! When this incident happened, both of our CO detectors went off (the one next to the stove and the one near our bedrooms followed about 5 minutes later). My point being, what if we'd only had one and it failed..