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| Go Green | Indoor Air Quality |
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Eco-friendly building methods can help to improve indoor air quality by utilising materials which do not use solvents, plastics and other harmful chemical pollutants such as formaldehyde, trichloroethylene and benzene. These volatile organic compounds (VOCs) are carried in the air after having evaporated out of paints and building materials. It has been shown that the indoor environment can be up to ten times more polluted that the outdoor environment. We spend 80% of our lives indoors in that polluted environment. NASA, in their Clean Air Study, recommends using an air-filtering plant for every 10 sq metres of floor space to assist in removing chemical pollutants carried in the air. Interestingly, many of South Africa's indigenous plants are suitable as houseplants for this very purpose. See List of air-filtering plants for more information. Fix any moisture or leak problems immediately. Mould, mildew, dust mites and other allergens are biological indoor air pollutants that can also contribute to sick building syndrome, aggravate allergies, and deteriorate building components. The effect of these biological pollutants can be avoided by using materials such as bamboo, ceramic tile and linoleum rather than carpet and porous materials. Eco-friendly building reduces the effects of these polluting substances on indoor air quality by improving the flow of natural air through the environment. Fit a skylight or two and let the day light in. Installing skylights which can open, will allow any heat build up to escape causing a thermo siphon effect. This will draw in fresh air and improve the air quality for free. Minimize use of carpet. Chemically treated carpets, adhesives, and backings can emit numerous chemicals. Also carpets can contribute to indoor air pollution due to collection of dust and other pollutants in the carpet fibers. Where carpet is used, obtain test data prior to purchase and avoid carpets with topical chemical treatments. Consider airing-out the carpet prior to installation and use of a zeolite mineral wash to help absorb odours. Use low-VOC adhesives for installation. Consistent maintenance is also important.
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