Pre-Filters Value-pack(24)AllerAir Pre Filter Replacement 24 Value Pack The Pre Filter 24 Pack is designed for use with AllerAir air purifiers, serving as the first layer of defense against larger airborne particles. Captures dust, hair, lint, and other larger debris before they reach the main HEPA and carbon filters Extends the life of your primary filters and helps maintain optimal airflow and purification performance Easy to replace and essential for keeping your unit