Merv 13 Pleated Air Filter - 15 1/2" x 21 1/2" x 1" Quantity:12-pack This is designed to fit

This is designed to fit into 1" Return Air Grilles

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The unit also includes a magnetic mounting bracket for optional installation inside air handlers

and the greater the pressure drop it creates

Merv 13 Pleated Air Filter - 15 1/2" x 21 1/2" x 1" Quantity:12-pack This is designed to fitAny Kind of Filter's Extended Surface Pleated Filters outperform ordinary furnace filters with medium efficiency and are designed for lower pressure drop, and long service life which reduces HVAC equipment maintenance and energy costs. A higher MERV rating means that the air filter that you are about to purchase possesses a higher amount impurity filtration ability than your ordinary filter.