This carbon impregnated disposable pleated panel filter is 18x30x2 and measures 17.5x29.5x1.75. This product is a simple solution for controlling both odors and dust particles! Odorous gases and vapors are attracted to and held by the unique properties of the activated carbon material. The filter can be installed in virtually any HVAC system without modifications. Ideal applications include odors from cooking, new paint, new carpet, bathroom smells, cigarette smoke odor, pet odors. This product is listed and rated by Underwriters Laboratories as U.L. Class 2.