ssgardener, welcome to the forum.
I didn't feel like I could go to sleep without calling as carbon monixide, even the possibity of carbon monixide is too dangerous to ignore.
Zuzu, I just didn't expect two fire trucks and six guys. I was really embarrased after it turned out to be a false alarm.
Cindi, My garage is not attached to the house, I don't own a dryer. The firemen did actually tell me it was best to have two Carbon Monixide alarms but I just hve only one.