Filters, a new study from The Freedonia Group Inc, says this growth reflects improved manufacturing activity and industrial investment, a recovery in motor vehicle production and sales, and a rebound in consumer spending from a low 2010 base.

Stricter environmental regulations - particularly those involving reduced emissions from electric utilities and diesel engines, and better water quality - will also drive growth. Additionally, Freedonia expects heightened concerns about water and indoor air quality to boost demand for filters in the consumer market.

Ongoing sales in the aftermarket, which accounts for the vast majority of demand, will also drive gains. However, growth in the aftermarket will be offset somewhat by users’ tendency to replace filters less often than recommended by manufacturers. Longer lasting media or other technologies that extend filter life will also restrain sales.