Methods to Improve IAQ

Sources of Indoor Air Pollutants

Air pollutants can be broken down into two categories: Gases and Particles

Gases

Formaldehyde
Formaldehyde is a chemical that is used in many different construction materials like particle board and carpeting. In new or newly renovated buildings the carpeting and walls made of particle board can off-gas (release formaldehyde gas) into the air. This can be a significant health hazard in a poorly ventilated area.

Radon
One of the main sources of radon is the earth and rock beneath one’s home. Radon is a radioactive gas found naturally in the air and in the ground. In some areas there is a high concentration of radon in the ground which seeps into the basements of homes and buildings.

Carbon Monoxide
Carbon monoxide is a gas that is most commonly found in automobile exhaust.

Particles

Pollens
Pollens come from trees, grasses, and other plants like ragweed. Though they originate outdoors, they make their way indoors and affect the indoor air quality.

Mold
Mold affects millions of homes and other buildings. It is most likely to grow in damp and poorly ventilated areas. Basements are the most common site of mold growth in homes, but mold can grow anywhere in a house or building.

Dust Mites
Dust mites are common in all homes and buildings. They feed mainly on shed human skin and are especially common in bedding and mattresses.

Bacteria and Viruses
Many bacterial and viral diseases can be transmitted from person to person through the air.

Other Chemical Problems

Paint, house cleaning products, and many other common products are sources of VOCs (Volatile Organic Chemicals). Also, certain areas may be exposed to dangerous chemicals that are caused by local industrial activity or exist naturally.