Air filters are devices used to remove contaminants such as dust, pollen, and other particles from the air. They are commonly used in heating, ventilation, and air conditioning (HVAC) systems, as well as in industrial applications and in residential settings. Air filters work by using various types of filter media, such as pleated paper, foam, or synthetic fibers, to capture particles as air flows through the filter. The filter media may be pleated or folded to increase the surface area and enhance filtration efficiency.
Air filters are rated according to their efficiency in capturing particles of different sizes, usually measured in microns. The MERV (Minimum Efficiency Reporting Value) rating system is commonly used to rate air filters in HVAC systems, with higher MERV ratings indicating better filtration efficiency. In addition to improving air quality by removing contaminants, air filters can also help to protect HVAC equipment and extend its lifespan by preventing the buildup of dirt and debris on the equipment. Air filters come in different sizes and shapes to fit different systems and applications. Some air filters are disposable and must be replaced periodically, while others are washable and can be reused. The frequency of replacement or cleaning depends on the specific application and the level of air pollution.
