Indoor Air Q&A

Q: What are some of the biological problems I should be concerned about?

A: Molds, mildew, fungi, bacteria and dust mites are some of the main biological pollutants inside the house. Some, such as pollen, are generated outside the home. Mold and mildew are generated in the home and release spores into the air. Mold, mildew, fungi and bacteria are often found in areas of the home that have high humidity levels, such as bathrooms, kitchens, laundry rooms or basements. Dust mites and animal dander are problematic when they become airborne during vacuuming, making beds or when textiles are disturbed.

Q: What are some of the health effects?

A: Allergic reactions are the most common health problems associated with biological pollutants. Symptoms often include watery eyes, runny nose and sneezing, nasal congestion, itching, coughing, wheezing and difficulty breathing, headache, dizziness and fatigue. Dust mites have been identified as the single most important trigger for asthma attacks.

Q: How are biological contaminants transported through the house?

A: Molds and dust mites thrive in areas of high humidity. Mold grows on organic materials such as paper, textiles, grease, dirt and soap scum. Mold spores float throughout the house, forming new colonies where they land. Dust mites thrive on dead human skin cells and in textiles such as bedding, carpeting and upholstery. When these textiles are disturbed during vacuuming, making beds or walking on carpet, the dust particles become airborne. Pollen, plant material that enters through windows or on pets, and animal dander also become airborne when disturbed. These airborne allergens then

continuously circulate through your indoor air due to being trapped inside your highly insulated, energy-efficient homes.

Q: What can I do to deal with the problem of biological contaminants in my home?

A: First of all watch for the signs. You can sometimes see and smell mold colonies growing on surfaces. Mold growth should be suspected wherever there are water stains, standing water or moist surfaces.

• Prevent mold growth by keeping basements, bathrooms and other rooms clean and dry. Use a disinfectant to clean surfaces that have mold on them. If carpeting or furnishings become wet, they must be quickly and thoroughly dried or discarded.

• Humidifiers, dehumidifiers and air conditioning condensing units should be regularly cleaned with a disinfectant such as chlorine bleach.

• Vacuums with high efficiency filters or central vacuum systems can help reduce the airborne dust generated by vacuuming.

• Keep humidity at acceptable levels (less than 50 percent) and make sure there's plenty of ventilation throughout your home, especially in areas where moisture tends to build up. How? The latest technology in indoor air management, Venmar's Pure Air Machine, offers the best solution to reducing indoor pollution caused by biological contaminants by combining the efficiency of HEPA filtration and effective mechanical ventilation.

• The Pure Air Machine allows polluted air to exit and fresh air, filtered by a HEPA filter, to flow through the home. It also allows excess humidity and dangerous mold spores, volatile organic compounds (VOC), and carbon monoxide that are not captured by filtration, to escape the home. For more information on indoor air quality and mold call 1-800-567-3855 or visit www.venmar-ventilation.com.

- News Canada