Merv 8 Pleated Air Filter - 9 1/2" x 9 1/2" x 1" Quantity:12-pack And there are no metal

And there are no metal parts that could lead to corrosion or oxidation within the filter

than standard fiberglass filters purchased at retail outlets

if not you can measure it or check the HVAC unit and the owner‰۪s manual

To find the size the old unit should have sizing information printed on it

the greater it's resistance to airflow

Merv 8 Pleated Air Filter - 9 1/2" x 9 1/2" x 1" Quantity:12-pack And there are no metalAny 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.