24x24x1 MERV 11 Pleated Air Filters.  Case of 12 

The Pamlico MERV 11 is an extended surface, pleated air filter, created to provide low initial resistance, high dust holding capacity and low pressure drop. The MERV 11 is a great choice for applications that need to be upgraded from standard minimum efficiency reporting value (MERV) 3 fiberglass air filters. The MERV 11 filter which traps more than 98% of airborne particles is perfect for commercial use. The filters were constructed to las longer than a traditional air filter depending on the indoor environment. 

The MERV 11 has a durable, moisture-resistant, beverage board frame with wire-supported media. It is held in place by a heavy-duty two-piece die cut frame, and has diagonal grid supports for added strength. The MERV 11 media is an electrostatic media designed for use in elongated surface pleated filters.