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Removal of Indoor Air Contaminants by Wool Carpet

Technical Bulletin - February 2007

Polluted indoor air can lead to discomfort, reduced efficiency and even ill health amongst employees and residents in buildings.


Wool carpet has been shown to rapidly neutralise formaldehyde, nitrogen dioxide and sulphur dioxide, common contaminants in today’s indoor environment.


Not only does wool neutralise these contaminants more quickly and completely than synthetic carpet fibres, it does not re-emit them, even when heated.


Wool carpet may continue purifying the air for up to 30 years.


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Research by AgResearch scientists has revealed that wool carpets play a significant role in reducing the levels of common indoor air contaminants in buildings. 


Indoor air pollution is seen as the primary cause of Sick Building Syndrome (SBS), resulting in reduced efficiency and increased instances of ill health amongst employees and other building occupants.


The issue of indoor air quality is receiving increasing attention as a public health concern because people spend a much higher proportion of their time indoors. The problem is exacerbated by the tendency for modern buildings to have air conditioning, which requires a semi-sealed environment to operate efficiently. This, in effect, traps the pollutants inside.