Carbon monoxide is an odorless, colorless gas that often goes undetected, striking victims caught off guard or in their sleep.
Carbon monoxide is produced by burning fuel in cars or trucks, small engines, stoves, lanterns, grills, fireplaces, gas ranges, portable generators or furnaces. When the gas builds up in enclosed spaces, people or animals who breathe it can be poisoned.
The National Safety Council recommends you install a battery-operated or battery backup carbon monoxide detector in the hallway near each separate sleeping area in your home. Check or replace the battery when you change the time on your clocks each spring and fall and replace the detector every five years.