Factory original Aprilaire No. 201 fits the Spacegard / Aprilaire 2200 and 2250 air cleaners. Comes in money-saving 2-pack for lower product and shipping cost. Manufacturer recommends replacing filter at least once a year.
Or, if you would like to upgrade your air cleaner have nearly double the air cleaning ability, you can purchase Aprilaire's upgrade filter kit.. Plus, this upgrade kit makes it easier to replace your filters since pleat spacers are no longer needed.