18.5" x 27" x 15" Medium Efficiency Prefilter (Pocket)

Prefilter products designed to optimize efficiency and extend the life of more costly final stage filtration products

• Polyester media with a nylon scrim backing constructed with an over cut of media to eliminate air by-pass designed to protect and extend the service life of more expensive downdraft ceiling filters

• Assembled with a non-corrosive, galvanized frame (actual frame width is 7/8"; designed to be inserted into a 1" track / holding frame).