We supply filter foam, in any shape or quantity, in many different porosities, for filtering air or liquids. We can shape filter foam Filter Foamfor any HVAC application, in many types of material, from open-celled foams to closed-cell foams, for HEPA performance. Most filter applications specify open-celled polyester foam, but our designers can work with you to choose the proper material and help you design the proper configuration for your application.