420 & 440 Polyester Cube Filters

The Airex 420 polyester cube is a tackified two ply material and the Airex 440 polyester cube is a three ply tackified material. Both are available in a variety of standard common sizes 15" deep. The 420 cube has a MERV rating of 6 and the 440 cube has a MERV rating of 8. The dual pocket design gives each filter a greater filtering surface to capture more dirt and dust. The polyester material is attached to an 1/8 inch wire galvanized steel header frame with a center support rod for added support. Each filter has an open area of not less than 95% with a very low initial pressure. The pockets are designed to allow full inflation while maintaining adequate air to flow freely. Each pocket is heat sealed and then stitched around the wire ring or frame. When installed into any system a side by side gasket like seal is created. A 13/16 inch header can be added when needed for certain tracking systems. The Poly Cube filter works great in areas where moisture is a problem.

How to Correctly Measure Your Air Filter Size