•Look for CO exposure symptoms including headache, dizziness, weakness, sleepiness, nausea and vomiting that can progress to disorientation, coma, convulsions and death.
•If you suspect CO poisoning, open doors and windows, turn off gas appliances and go outside. Call 911.
•Look at the color of the flame. A hot blue flame produces less carbon monoxide (CO) and more heat than a flickering yellow flame. If you see yellow flames in your furnace or stove burner, it should be adjusted so that the flame is blue.
•Don't use unvented gas or kerosene heaters in closed spaces, especially sleeping areas.
•Don't use gas appliances such as an oven, range or clothes dryer to heat.
•Don't burn charcoal inside, even in a fireplace.
•Never use an electrical generator indoors or in an attached garage. Only operate it outdoors in a well-ventilated, dry area, away from air intakes to the home, and protected from direct exposure to rain and snow, preferably under a canopy, open shed or carport.
•To prevent fires, make sure heaters, stoves, and fireplaces are at least 3 feet from anything that burns. Use screens in front of fireplaces, and do not leave children alone with space heaters. Never leave candles burning when you are not at home or while you are sleeping. If a heater uses fuel like propane or kerosene, use only that kind of fuel and add fuel only when the heater is cool. Store fuels outside.