The Aprilaire 201 (2-Pack) is a MERV 10 air purifier replacement filter for Aprilaire model air cleaners 2200 and 2250. The collapsible pleated fabric filter media is easily installed to keep your HVAC equipment running at top efficiency. This type of filter design also allows for reuse of your system’s existing plastic pleat spacers. Ultimately, this filter helps trap and reduce allergens that can cause persons afflicted with asthma and other respitory problems. Order today!