The Aprilaire 501 air filter media replacement removes up to 99% of pollen, mold, spores, dust and other airborne allergens from your air. This air cleaner filter also removes up to 95% of tobacco smoke and particulates. Yearly replacement is recommended for peak performance.
Efficiency Rating: Merv 10
Dimensions: 16" x 27" x 6"
Replacement filter for Spaceguard/Aprilaire 5000