Merv 11 Pleated Air Filter - 10" x 20" x 1" Quantity:12-pack such as dust

such as dust

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

the greater it's resistance to airflow

They are easy to install with custom air filters made to the sizes that you specify

Merv 11 Pleated Air Filter - 10" x 20" x 1" Quantity:12-pack such as dustAny 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.