Accumulair Emerald 16x36x0.5 (15.5x35.5x0.5) MERV 6 Air Filter/Furnace Filters (2 pack) Nominal size is 16x36x0.5. Actual size is 15.5 x 35.5 x 0.5. MERV 6 Rating. Each filter lasts up to 3 months. Economical, high-capacity media makes this filter an ideal upgrade from standard fiberglass throwaways. Captures a wide variety of airborne allergens including dust, mold, pet dander, and dust mites. 2 Pack of Air Filters