The PST Series is a traditional multi-denier media designed for general applications. The non-migrating, light, dry tackifier is on the blue downstream side to enhance dust retention. This media is an economical prefilter to extend the life of your final filters, or an adequate filter for less demanding, lower air flow applications.
The OR Series is a premium multi-denier, gradient density media designed for more demanding applications. The non-migrating, heavy dry tackifier is on the orange downstream side to enhance dust retention. This media is an economical alternative to pleats and panels in systems with low air flow.
Typical uses for both the PST and OR Series incluse all common HVAC applications such as commercial buildings, public schools, universities and manufacturing operations.