Cassette filters are a type of air filter commonly used in heating, ventilation, and air conditioning (HVAC) systems. These filters are called “cassette” filters because they are made up of multiple layers of filtration materials that are stacked or layered together in a cassette-like structure.

The layers of filtration materials used in cassette filters can include activated carbon, synthetic fibers, or other materials designed to capture and remove dust, pollen, mold spores, and other airborne particles. Cassette filters are generally more efficient at capturing smaller particles compared to standard flat panel filters.

Cassette filters are easy to install and replace in HVAC systems and can help improve indoor air quality by reducing the amount of airborne particles circulating throughout a building. They are commonly used in commercial, industrial, and residential settings where air quality is a concern.