Today I am in Chicago and have had quite an eventful day. First, I woke up to my carbon monoxide detector going off, so I called the fire department. Then, I accidentally armed my alarm system and that started going off - only problem there is that I have never enabled it so I didn't know what the code was! So that's blaring, the CM detector is chirping, and the fire engines are on their way. The firemen (all total southside Chicago guys...super nice to me but not exactly the hot fireman stereotype - I was crushed) got a moderatly low CM reading and called Peoples Gas to come out and take a look....turns out it was due an open fireplace damper and a dirty furnace filter. I am such a girl.