Carbon monoxide is a normal by-product of fuel combustion, but high levels of it indoors can be dangerous to your health. All fuel-burning appliances need air for safe and efficient combustion to take place. Without sufficient fresh air, harmful levels of carbon monoxide may also occur. Running a vehicle inside a garage is the most common carbon monoxide danger. But during the heating season, when fresh air circulation is reduced, it's especially important to prevent carbon monoxide buildup indoors.
Carbon monoxide has no odor, no color and no taste .
Because it combines with the body's blood and prevents it from absorbing oxygen, carbon monoxide can cause serious illness and, in extreme cases, can even be fatal. Indicators of high levels of carbon monoxide in the home can include extremely stuffy, stale air, or water condensation dripping on the inside of windows. Symptoms of carbon monoxide exposure can include headaches, nausea, dizziness, coughing, ringing in the ears, spots before the eyes and reddened skin color. If you notice any of these warning signs, get outside to fresh air and get to the doctor immediately. Keep your chimney and vent piping clean.