The DUO PAK 40 is a 2-ply filter measuring 24x24x20, designed for high-efficiency air filtration. Manufactured by Koch Filter Corp, this filter comes in cartons of 5, making it a practical choice for regular maintenance. Its dual-layer construction enhances dust retention while ensuring low airflow resistance. Suitable for various HVAC applications, the DUO PAK 40 meets industry filtration standards, providing reliable performance and improved indoor air quality.
