Static and cartridge filters are used to clean indoor air and air being used in turbines and industrial processes. The industrial market has been growing faster than the commercial and residential markets and will comprise 62 percent of the total market in 2014, according to a study by the McIlvaine Company.
McIlvaine says one of the biggest industrial sectors is power, where air filters are used to purify the air used for combustion in gas turbines. Due to the fact that some ambient air quality rules are so stringent that the exhaust has to be cleaner than the ambient air, the filter must not only protect the turbine but also take out enough particles to meet the stack gas particulate limits.
Another growing application is offshore oil and gas, where ambient air is contaminated by sea salt and requires treatment prior to exposure to equipment and controls.
The metals industry includes some small applications, but most of this category is comprised of cabin air filters for automobiles. The electronics sector is divided into two main segments:
• Filters to protect the final product while in use; and
• Filters to protect the product during manufacture.
Filters are used to protect sensitive electronic equipment, such as disc drives. Semiconductor and flat panel manufacturers, for example, need ultrapure air surrounding their manufacturing processes.