Carbon Monoxide - Reference Guide to Major Indoor Air Quality Pollutants in the Home

In this series, we'll detail the sources, health effects, levels in the home, and steps to reduce exposure to the 11 major indoor air quality pollutants in the home.

Carbon Monoxide

Sources
Unvented kerosene and gas space heaters; leaking chimneys and furnaces; back-drafting from furnaces, gas water heaters, woodstoves, and fireplaces; gas stoves. Automobile exhaust from attached garages. Environmental Tobacco Smoke.

Health Effects
At low concentrations, fatigue in healthy people and chest pain in people with heart disease. At higher concentrations, impaired vision and coordination; headaches; dizziness; confusion; nausea. Can cause flu-like symptoms that clear up after leaving home. Fatal at very high concentrations.

Levels in Homes
Average levels in homes without gas stoves vary from 0.5 to 5 parts per million (ppm). Levels near properly adjusted gas stoves are often 5 to 15 ppm and those near poorly adjusted stoves may be 30 ppm or higher.

Steps to Reduce Exposure:

• Keep gas appliances properly adjusted.
• Consider purchasing a vented space heater when replacing an unvented one.
• Use proper fuel in kerosene space heaters.
• Install and use an exhaust fan vented to outdoors over gas stoves.
• Open flues when fireplaces are in use.
• Choose properly sized woodstoves that are certified to meet EPA emission standards. Make certain that doors on all woodstoves fit tightly.
• Have a trained professional inspect, clean, and tune-up central heating system (furnaces, flues, and chimneys) annually. Repair any leaks promptly.
• Do not idle the car inside garage.

Next in this series... Nitrogen Dioxide (NO2)

*Content provided by the Consumer Product Safety Commission and the Environmental Protection Agency. CPSC Document #450. This document is public domain.*

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Don’t Invite an Invisible Killer to Your Home

      You can’t see it, touch it, smell it or taste it, but it kills hundreds of people each year. Poisoning by carbon monoxide is a real risk of modern life. A professional inspection of fuel-burning appliances – including furnaces, stoves, fireplaces, clothes dryers and space heaters – could prove to be a lifesaver. The U.S. Consumer Product Safety Commission (CPSC) recommends that the yearly, professional inspection include:

§  Checking chimneys, flues and vents for leakage and blockage by creosote and debris.

§  Checking all vents to furnaces, water heaters, boilers and other fuel-burning appliances to make sure they are not loose or disconnected.

§  Inspecting vent pipes on heating systems (i.e. oil/gas/propane furnaces & boilers).

§  Inspecting appliances for adequate ventilation. A supply of fresh air is important to help carry pollutants up the chimney, stovepipe or flue, and is necessary for the complete combustion of any fuel.

§  Making sure ventilation air openings aren’t blocked.

You can read more here to see how to protect your family from this dangerous, potentially lethal gas.