Custom Air Filter Accessories and Filtration Products

As a custom air filter manufacturer, we provide a long list of air filtration products and parts including:

Center Rod Support

We can install aluminum or stainless steel rods weaved within, or between layers of, the media on all framed filters. These may be necessary in large surface area applications with higher CFM, or high aspect (narrow width and long length) applications. Material matches the frame and is usually 1/8″ diameter. Fabricate with rods defined in your specifications also available.

Corrugated Expanded Metal Support

Corrugated expanded metal, used in mist eliminators, can also be used for structural support between multiple layers of filtration media. This type of support can create an internal particle accumulation chamber, in your application. The material matches your frame with LWD openings as determined by your required flow volume.

Elastic Edging

Filter media can be custom made to fit applications requiring a three-dimensional style filter – bonnet, sock or square styles. These models are finished with elastic edging for installation on to fan guards, round or square ventilation exhaust and air intake openings.

Expanded Metal Support

Filters requiring extra support can include expanded wire. Filters greater than 650 square inches will always include expanded support. Filters greater than one thousand square inches are not recommended and are not warrantied. Over-sized designs are more easily damaged during routine maintenance and often create shipping difficulties. We recommend that you utilize two smaller filter panels in place of one over-sized.


A unique new way to install PreVent® filters onto the outside of equipment air intakes. Durable black plastic mount clips easily attach filter (3/8″ grommet) to equipment. These quick mounts reduce installation time to minutes and require no tools. Eliminating the need to drill into equipment, this mount clip contains a powerfully strong neodymium “earth” magnet that sticks to metal surfaces, allowing them to be repositioned as needed. Non-metal surface installations are easy with the addition of our press on steel plate adapter containing high bond, high tensile strength tape adhesive permanently affixed to surface. The clip’s moveable tab opens and closes for secure installation and easy removal to clean. Patent No. US 10,180,265

Mount Plate

Using MagnaMount on any non-metal surface installations is easy with the addition of our press on steel plate adapter. Mount plates contain high bond, high tensile strength tape adhesive that can be permanently affixed to the non-metal surface.

Magnetic Mounting

We offer a unique and patented magnetic frame design that allows a prefilter to stick to the outside of steel air intake louvers, meaning that they are accessible from the outside with no need to dismantle the case to retrieve filters for cleaning. Magnetic stripping can be attached to the steel filter frame with adhesive. When measuring for a magnetic backed Model R, keep in mind that the frame must extend 1/2 inch over the inside edge of your intake opening on all four sides, and rest on a flat steel surface. We also offer a flexible vinyl edging containing magnetic stripping for attachment to a metal grid system or steel cabinet. Patent No. US 6,793,715

Mount Hole Machining

We can drill your mounting holes precisely in the location shown on your drawing. A one-time (NRE) tooling charge is applicable when size, location or large volume requires customer owned fixture. In most cases, this charge will pay back in labor over your first order. For quality cost, and most importantly safety reasons, please let Permatron perform this operation.

PreVent Mounting Grommets

Our PreVent Models U-1, U-2 and BHA are finished with a 2.5″ flexible vinyl binding. The vinyl is folded over the edge of the media and sewn into place to create a finished 1.25″ filter frame. We install 3/8″ ID, 13/16″ OD stainless steel grommets for an easy mounting option. Unless you specify differently, the grommets will be spaced evenly in the range of every 10 to 12 inches, by dividing your width and height measurements and rounding up. Custom grommet placement requires a drawing. Keep in mind that the vinyl edge and grommets need to rest on a flat steel surface surrounding the air intake opening for installation. Some intakes have minimal flat surface area for installation. Advise us if this is the case as we may need to allow for it.

PreVent & HailStop Plastic Mounting Clips

Durable black plastic mount clips are available to easily attach filter (3/8″ grommet) or netting to equipment. Clip (with (2) #6-3/4″ hardened steel self tapping screws) has a moveable tab that opens and closes for secure installation and easy removal to clean. Single height mount clip available for PreVent Filter or HailStop. Double height mount clips are available for HailStop and PreVent filter installation together.

PreVent Mounting Adhesive

PreVent equipment protection filters that include hook/loop installation components need to be installed properly for long term use. The loop side is sewn onto the vinyl edge of the filter. You will be attaching the hook side with adhesive backing to the equipment housing. Initial installation should be done at temperatures of 50° or higher. The hook side must be installed on a clean surface. Clean the equipment surface using an alcohol based liquid to remove any existing grease or grime. Remove the protective tape backing from the hook strip. Press firmly while applying the hook stripping to the equipment housing. Even distribution of the adhesive is required for a firm long-term hold. Run a hard plastic spatula or rubber seam roller over the hook stripping with firm pressure to ensure all air bubbles have been removed.

PreVent Mounting Jack Nuts

Kits are available for use to install PreVent filters with grommet attachment:

(12) ¼” Jack Nuts / (12) ¼” Hex Washer Screws / Fits I.D. 3/8″ and 13/32″ Grommet

(12) #10 Jack Nuts / (12) #10 Hex Washer Screws / Fits I.D. 1/4″ Grommet

PreVent Snap Connection

Extra large air intake applications utilize two or more PreVent screens for full intake coverage. Black plastic snaps (fits standard 3/8″ grommet) are available to combine or overlap the inside vinyl edge of our Model U or Model BHA filters for a smooth and secure installation.

PreVent Vinyl Edge Stitching

When finishing a filter with flexible vinyl binding, double row stitching is standard.

Pull Tabs / Handles

3/8″ wide by 1-1/2″ long vinyl cloth strip pull tabs can be easily added to either steel framed or vinyl edged filters for easy filter access. A zinc plated metal ring hanger pull tab riveted into frame is available in two sizes for installation on 1/4″ or 1/2″ and 1″ thick steel frame filters. Metal handles may also be used on most permanent type filters and can be easily attached to filter with rivets. Manufactured with heavy galvanized steel wire and shaped into an oval that can be laid flat against filter or pulled out so it can be easily grasped.

Z Bracket

Over-sized filter designs (+1,000 sq. in.) are more easily damaged during routine maintenance. We recommend that you utilize two smaller filter panels in place of one over-sized. When using two filters, installed side by side, we recommend using our Z bracket, applied to the shortest dimension, unless otherwise specified. One filter has the magnetic stripping on three of its four sides with the Z bracket riveted to the fourth side. The second filter has the magnetic stripping attached to all four sides. This allows the second filter to butt up closely next to the first one for complete air intake coverage.


  • I had some good feedback from the client who uses our MH3 compact thermoelectric counter top cooler: • The filters are very easy to install. • They should help extend the life of the chillers. • They haven't had to replace any chillers that have the filters installed.

    Mike FennellMTL Technologies, Purchasing & Process Improvement
  • I reached out to Permatron about putting branded labels with part numbers on every Thermo King air filter. Some of our customers replaced original equipment air filters with look-alike filters, which had a negative impact on the performance of their equipment. While working on the air filter labels we added a packaging project, requiring a few more labels and packaging material. The project was big, but thanks to an awesome communication flow, the changes were completed fast and implemented seamlessly. Now our customers can easily differentiate between original equipment and non-original equipment air filters.  Because the branded air filters come prepackaged from Permatron, our dock-to-stock time improved by over a week.  

    Urszula Maj-ZawieruszynskiThermo King Aftermarket Product Manager
  • As you know, we offer your R2 magnetic filters as an option on our air compressors. The feedback from our sales people and customers has been very positive. The product is durable and offers a quality alternative to disposable filters. We are very pleased with the quick delivery times. In addition, the product does an excellent job keeping dirt away from the critical components on our compressors. As you probably know, compressors tend to be installed in the worst possible location. Just look for the hottest, dirtiest place in a plant and you will usually find the air compressor. Without the R2 filters our customers would experience greater service costs on their equipment

    Drew JohnsonKaeser Compressors
  • 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 was not familiar with Permatron R-2 filters until I started working at Delta Industries. Now that I see how well the R-2 filters have been working I talk them up to my customers. A couple of our customers were so impressed the decision to apply R-2 filters to other applications such as water chillers and electrical control cabinets have proven successful. Industrial applications we have placed R-2 filters include machine shops, foundries, woodworking shops and even the CTA in a dusty bus garage. Other applications that have proven successful are shops that operate with open doors especially during the cotton wood and dandelion seeding seasons

    Jim ApplebyDelta Industries, Downers Grove, IL
  • I use the PreVent Model R filters with magnetic option that allows them to stick to the ironsteel surface of my Kaeser compressors, Kaeser air dryer and YASKAWA inverter on a Braun washer. I rinse with hot water once a week. These can be used in many applications and do save significant time for maintenancePM work. I also have installed this type filtration on all HVAC units. Easily eliminates 90% of lintdust that otherwise enters these areas

    Mark WearAramark Uniform Services, Oklahoma City, OK

Permatron specializes in custom air filters available with a variety of accessories to meet OEM design and manufacture specifications.