The PerfectPleat HC M8 air filter measures 21-1/2 inches by 36 inches with a thickness of 2 inches, designed by AAF International. This high-efficiency filter utilizes a pleated design to enhance airflow while capturing airborne particles effectively. Constructed with durable materials, it meets industry standards for air filtration, ensuring compliance with ISO and ANSI regulations. Ideal for commercial HVAC systems, this filter is compatible with various applications, providing superior performance in maintaining indoor air quality. The M8 rating indicates its ability to trap a significant amount of dust and allergens, making it a reliable choice for environments requiring clean air.