A plate and frame air filter is an air filtration system that uses a series of plates and frames to filter pollutants from the air. It consists of a frame containing a number of filter plates stacked on top of each other. These boards contain filter media, typically made of materials such as fiberglass, pleated paper, or activated carbon, designed to capture and remove airborne particles, dust, pollen, smoke, and other air pollutants.

The air enters the filter through the intake pipe and passes through the filter medium in the plate. When air passes through the filter medium, contaminants are trapped on the surface or inside the filter, allowing only clean air to pass through. The filtered air is then directed back to the surrounding environment through the exhaust pipe.

Plate-frame air filters are commonly used in HVAC systems, industrial applications and clean rooms where air quality is critical. They offer effective filtration and are available in a variety of sizes and efficiency classes to meet different air quality requirements. The plates and frames in these filters can be easily removed and replaced, making maintenance and filter replacement relatively simple. It is important to clean or replace the filter plate regularly to ensure optimal performance and prevent dirt and debris buildup, which can reduce airflow and reduce the efficiency of the filter.