PermaFlo® Rigid Nonwoven Polyester | Gray | Blue

PermaFlo nonwoven polyester air filtration media is an excellent choice for better air quality and as a mist eliminator, providing solid filtering performance. This rigid, heavy-duty nonwoven polyester media is self-supporting and frames are optional. Humidity resistant, PermaFlo will not absorb moisture or sag in moist environments. UL Classified as to Flammability Only; FMVSS302 certification. PermaFlo can be easily cut-to-fit with scissors, and is available in rolls or custom cut pads.

This type of heavy duty washable air filter media is easily cleaned with water for long term use. It’s bi-directional (unlike hogs hair that must be installed correctly or face loading rapidly occurs) air flow insures that it can’t be installed wrong. PermaFlo offers superior filtering performance with a lower initial resistance to airflow than pleated filters – 0.03″ w.g. in 1/2″ thickness and 0.07″ in 1″ thickness.

PermaFlo is better than metal mesh mist eliminators and hogs hair filters. For one thing, this type of heavy-duty washable air filter media is bi-directional so it can’t be installed wrong, while a hogs hair filter must be installed correctly or face loading rapidly occurs. Also, unlike a hogs hair filter, PermaFlo air filtration media is unaffected by moisture so it cleans easily for long term use. It is safe to handle, with no fiberglass or sharp edges, and doesn’t flake or shed.

Independent test results for water penetration using UL-50 rain yielded “no water droplets penetrating to the inside of the testing chamber. No moisture on the back side surface of the expanded galvanized protective screen.”

PermaFlo provides superior filtering performance with a lower initial resistance to airflow than pleated filters – 0.03″ w.g. in 1/2″ thickness and 0.07″ in 1″ thickness.

  • PermaFlo® Gray Rigid Polyester is a better mist eliminator. Antimicrobial has been added to this heavy-duty filter media to inhibit the growth of bacteria, fungi, mold spores, mildew and other contaminants that can be created in environments with constant humidity and moisture.
  • PermaFlo® Blue Rigid Polyester is a fantastic alternative to hogs hair filter media, providing high-quality filtering performance and an economical alternative to disposable air filters.

PermaFlo is Available in Pads or Service Rolls

PermaFlo media can be cut with scissors to the exact custom size each application requires, eliminating air by-pass. Convenient pads or service rolls are available in:

  • 25″ x 48′
  • 25″ x 36′
  • 30″ x 36′
  • 15″ X 24″ X 1/2″ Bulk Packed Pads
  • 20″ X 25″ X 1″ Bulk Packed Pads
  • 20″ X 25″ X 1″ Display Packs

Steel pad stabilizing frames for use in filtration applications involving media pad change outs are also available for cut pads. Stabilizing frames are available with crisscrossed wire supports to hold the media pad into frame.

Nonwoven Media Mount Adapter

This washer kit is an add-on piece to install rigid air filter pads of nonwoven polyester media firmly in place on HVAC air intakes. The black nylon washer is UV protected and fits over single or double height Permatron mount clips. Available in 12 packs. Simply start by adding a hole through the polyester media pad by using a screwdriver or another pointed tool, push the media down onto the open mount, and place the washer on top. Close tab downward, locking in position. The filter media is secured in place, even against high winds. (Model# WASHER-MEDIAKIT)


  • Thanks to Permatron screens maintenance engineers in Utah save tons or time in preventive maintenance. Thank you Permatron!

    Mike ReidyRoto Aire Sales and Service
  • By using the PreVent filters, we've reduced our seasonal filtration costs by almost 70% and our maintenance and cleaning man-hours are about a third of what they were with the old filtration equipment.

    Angelo CarrieriWater and Sanitation District, Parker, CO
  • I'd like to take a moment to thank-you for your support, your quick replies and your thoroughness throughout 2012. It has been a pleasure working with you and your team and I look forward to doing so again in 2013.

    Melinda May AllastonAnnexair, Canada
  • I just sent off an email to my manager giving him all the info from Permatron so he can get this out to the rest of our After Market Sales people. I told him how happy I am and so are the customers that I been getting your product out to. Thanks for all your help with my end.

    Jim GoschAtlas Copco Compressors LLC
  • I have 2 customer problems that I solved with your products. These are both hospitals. One had a problem with air filters being damaged by moisture being pulled into them by powerful air handlers. The filters were failing prematurely. I sold them your Model IN filters 3 months ago for one of their air handlers. They just ordered more filters for a second air handler. They have seven more air handlers that could use the same filters, so hopefully there will be many more orders for these filters.  The other hospital had a problem with leaves, insects and debris getting into their air intake louvers.  I sold them the PreVent air intake screen, custom sized, to protect their louvers.

    Chris Van PattenJohnstone Supply, Troy, NY

PermaFlo rigid polyester air filter pads with bi-directional air flow are a perfect alternative to old fashioned hogs hair media.