What is Carbon Monoxide? CO Warnings CO Detectors
Carbon Monoxide Can Be DeadlyYou can’t see or smell carbon monoxide, but at high levels it can kill a person in minutes. Carbon monoxide (CO) is produced whenever any fuel such as gas, oil, kerosene, wood, or charcoal is burned. If appliances that burn fuel are maintained and used properly, the amount of CO produced is usually not hazardous.
However, if appliances are not working properly or are used incorrectly, dangerous levels of CO can result. Hundreds of people die accidentally every year from CO poisoning caused by malfunctioning or improperly used fuel-burning appliances.
Since many of these symptoms are similar to those of the flu, food poisoning, or other illnesses, you may not think that CO poisoning could be the cause.
If you experience symptoms that you think could be from CO poisoning:

A carbon monoxide detector is a device that detects the presence of carbon monoxide. If a high level of CO is detected, the device sounds an alarm to alert you and your family of a potential risk. Take immediate action and ventilate the area or safely leave the building if CO poisoning symptoms (confusion, headaches, nausea, dizziness, vomiting, etc.) are experienced (1).
To Purchase a Detector:
Carbon monoxide detectors can be purchased at most retail and hardware stores. More information can be found at the Underwriters Laboratories, Product Safety Tips.
More information: Carbon Monoxide
Information complied from:
WinterSafe, a Publication of FEMA and WMD Emergency Management Division
“Protect your family and yourself from Carbon Monoxide Poisoning” E.P.A. Indoor Air Quality
U.S. Consumer Product Safety Commission
(1). Wikipedia - Carbon Monoxide Detector