When responding to a carbon monoxide alarm activation, the member with the meter should take an initial reading at the front door of the premises, then continue inside to locate the source. In residential homes, heating and cooking appliances and vehicles running in a garage are common sources.  Another possible source that is often overlooked is carbon monoxide being forced back into the house due to a downdraft (reverse stacking) of flue gases from the chimney. Lastly, if the source of the carbon monoxide is not found inside the premises, the origin may be in an attached exposure or from somewhere outside of the building. 

                    Until Next "Year".......Stay Safe!                                                                               

                        Jeff