Air filters employ various mechanisms to capture and remove particles, pollutants and allergens present in the air. These pollutants can include dust, pollen, pet dander, mold spores, bacteria, and even microscopic particles. Consisting of a porous material or fibrous media, this filter allows air to pass through while trapping and retaining unwanted particles. The efficiency of an air filter is usually measured by its ability to trap particles of different sizes, expressed as a MERV (Minimum Efficiency Reporting Value) rating.

Air filters require regular maintenance, including cleaning or replacement, depending on the type of filter and the amount of contaminants in the environment. Neglecting filter maintenance can result in reduced filtration efficiency, increased energy consumption, and potential health issues due to poor indoor air quality.

In conclusion, air filters are an essential part of maintaining a clean and healthy indoor environment and ensuring the proper operation of various systems that depend on clean air intake.