PLEASE PLEASE PLEASE PLEASE!!!!!!!!!!!!!get a carbon monoxide alarm! I can't tell you how many people nearly- or did - kill themselves because of the fumes! We had one guy with a CO reading over 700 in his house and he SWORE it wasn't from the generator! BTW our meters have 2 preset alarms. The low one is 35 and the high is 70! his was 700!!!