Follow these tips for carbon monoxide safety:
Have fuel-burning heating equipment (fireplaces, furnaces, water heaters, wood and coal stoves, space or portable heaters) and chimneys inspected by a professional every year before cold weather sets in.
When purchasing new heating and cooking equipment, select products tested and labeled by an independent testing laboratory.
When using a fireplace, open the flue for adequate ventilation.
Never use your oven to heat your home.