Experts believe, however, that individuals with greater oxygen requirements such as unborn babies, infants, children, senior citizens and people with coronary or respiratory problems are a greater risk. The great danger of carbon monoxide is its attraction to hemoglobin in the bloodstream. Co is breathed in through the lungs and bonds with hemoglobin in the blood, displacing the oxygen cells need to function. Carboxyhemoglobin causes symptoms similar to the flu, such as headaches, fatigue, nausea, dizzy spells, confusion and irritability. As levels of COHb increase, vomiting, loss of consciousness and eventually brain damage or death can result.
Carbon monoxide is a by-product of combustion, present whenever fuel is burned.
It is produced by common home appliances, such as gas or oil furnace, refrigerators or clothes dryers, water heaters, fireplaces, charcoal grills, gas ranges, wood burning stoves and space heaters. Fumes from automobiles also contain carbon monoxide and can enter a home through walls or doorways if a car is left running in an attached garage. All of these sources can contribute to a CO problem in the home. If a home is vented properly and is free from appliance malfunctions, air pressure fluctuations or airway blockages, carbon monoxide will most likely be safely vented to the outside. A second detector near the home's heat source provides extra protection.