All Electrostatic Air Filters

Our Gold Frame filters are more durable and rigid than the Silver Frame filters. The 94 filters are UV protected, while the 82 filters are not (except for the Flex 82 - it IS UV protected). So if you have a UV purifier light installed in your air system, be sure to choose a 94 filter. The 82 and 94 refers to the efficiency of the filter and resistance to airflow. The 94 filters are the most efficient (94%) while the 82 filters are less efficient but allow more airflow (they are less restrictive). The 94 is recommended for all applications except in systems that have a reduced sized return opening. Flexible frames are available for applications where a rigid frame cannot be used. They have a 3/8" polyester layer and an resin stiffener applied between 2 layers of polypropylene and a polypropylene webbing frame which is sewn around the edge. These 3/8" thick filters fit most 1" applications.