Demand for filters in China is projected to increase 14.4 percent per year through 2011 to 41 billion yuan, according to a study by The Freedonia Group (www.freedoniagroup.com). The study, titled Filters in China, predicts advances in the country will be stimulated by solid growth in motor vehicle production in China, which together with a growing vehicle park, is expected to drive both OEM and replacement filter demand. In addition, growth in manufacturing output, building construction spending, and urbanization of the population are all forecast to stimulate demand for various types of filters. Government efforts to alleviate air and water pollution and to improve the quality of drinking water by enacting more stringent regulations and standards, will also contribute to gains, according to Freedonia. Meanwhile increased demand for newer products, such as motor vehicle cabin air filters and many varieties of household air and water filters, and the development of a significant aftermarket within these segments is expected to aid growth as well.