Merv 11 Pleated Air Filter - 6" x 21" x 1" Quantity:12-pack åÊWe look forward to delivering

åÊWe look forward to delivering our American-made

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

Produces no ozone or aldehydes

the greater it's resistance to airflow

This is designed to fit into 1" Return Air Grilles

Merv 11 Pleated Air Filter - 6" x 21" x 1" Quantity:12-pack åÊWe look forward to deliveringAny 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.