Unvented or faulty gas and kerosene appliances have the greatest potential to produce dangerous levels of CO in a home. In addition, many newer or recently remodeled homes are sealed tighter than older ones, creating the possibility of greater carbon monoxide risks. Without good ventilation, carbon monoxide levels rise, replacing oxygen in the bloodstream. The more CO in the air and the longer you are exposed, the greater the risk of illness or death. TDH lists 161 deaths from carbon monoxide poisoning in 1999.
Many more people become ill, often without knowing the cause.
Symptoms of carbon monoxide exposure include headache, dizziness, weakness, sleepiness, nausea and vomiting progressing to disorientation, coma, convulsions and death. A person exposed to high levels of carbon monoxide may feel bad and sleepy, lie down and fall asleep, never recognizing the danger. Anyone who suspects symptoms of CO poisoning should open doors and windows, turn off gas appliances, go outside for fresh air, then be sure anyone else who might have been exposed breathes fresh air as well. Have the heating system inspected annually. Have ventilation systems, including chimneys, flues and vents, checked each year.