Accumulair Carbon 16.5x21x1 (Actual Size) Odor eliminating Air Filter/Furnace Filter Actual Size Measures 16.5 x 21 x 0.75 Ideal applications include odors from cooking, new paint, new carpet, bathroom smells & pet odors Carbon impregnated disposable pleated panel filters A simple solution for controlling both odors and dust particles Lasts up to 90 days