Carbon monoxide and nitrogen dioxide are colorless, odorless gases.

Carbon monoxide interferes with the delivery of oxygen during exercise. It has the potential to cause unconsciousness, and even death, at a high concentrations.

Lower concentrations may cause:

• headaches
• dizziness
• weakness
• nausea
• confusion
• disorientation

Relatively healthy people may complain of fatigue, while those with chronic heart disease may experience increased episodes of chest pain.

Keep in mind that the symptoms of carbon monoxide poisoning are sometimes confused with the flu or food poisoning.

Nitrogen dioxide irritates the mucous membranes in the eye, nose, and throat and causes shortness of breath after exposure to high concentrations.

High concentrations or continued exposure to low levels of nitrogen dioxide may increase your risk of respiratory infections or developing a lung disease such as emphysema.

In home sources of these combustion products are:

• unvented kerosene and gas space heaters
• woodstoves
• fireplaces
• gas stoves.

The major pollutants released are carbon monoxide, nitrogen dioxide, and particles.

Adequate ventilation and proper maintenance of combustion producing equipment will go a long way in reducing your unhealthy exposure in your home.

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