Bryant/Carrier GAPCCCAR1620 16x20 Media Filter Filter fits Bryant Infinity air cleaner model GAPBBCAR1620 Filter dimensions: Nominal: 16" x 20" x 3-1/2" Actual: 17-1/2" x 21-1/2" x 3-3/4" Filter should be changed once per year under normal conditions Fits only GAPA Air Purifiers