
Of all the filters I've bought over the years, this is the ONLY one that works best for something that requires a 20" x 20" filter. While the actual size of other filters is 19 1/2" x 19 1/2", unfiltered air will pass through. Measuring 19 3/4" x 19 3/4", these filters filter more air in your home for your money and keep your oven/AC fan motor clean. They have a clear MERV rating mark and an airflow directional arrow. Her strength is almost standard. These filters are also made in the USA.

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