HVACQuick.com Accumulair 1 Inch Filters - MERV 8 FB21X23.25A

21x23.25x1 (Actual Size). Accumulair MERV 8 Filters. Accumulair Gold Series MERV 8 Filters - 1 inch thickness. Electrostatic charge captures airborne allergens SMALLER THAN 1 micron including fine dust, smoke, dander, mold, pet dander and dust mites. Also traps most large allergens including pollen and lint. Up to 20-times more effective at capturing micro particles than ordinary fiberglass filters. Designed for uniform air flow. Lasts UP TO 3 months. Will not support the growth of bacteria, mold, mildew or fungi in normal use. This product is listed and rated by Underwriters Laboratories as U.L. Class 2.