Air Demon replacement filters provide a combination of trapping and removing the smallest and potentially harmful particles in the air, while allowing the maximum amount of air to flow through the filter. The Air Demon consists of 100% synthetic, electrostatic media that is laminated and pleated against a heavy duty expanded metal backing. The pleat pack is enclosed by a 2-piece die cut box frame with multiple reinforcements on each side for stability and rigidity. With 33% more airflow and a 67% lower pressure drop than the competition, the Air Demon filter is one of the most efficient filters in cleaning performance and cost-effectiveness.