Merv 11 Pleated Air Filter - 13 1/2" x 29 7/8" x 1" Quantity:12-pack Then simply add that information

Then simply add that information to our easy to use order form above

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

The "Practical Pleat" contains over 500% greater surface area than a MERV 10 one-inch pleat

To order washable electrostatic custom air filters you just need to know the size of the current air filter

Merv 11 Pleated Air Filter - 13 1/2" x 29 7/8" x 1" Quantity:12-pack Then simply add that informationAny 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.