History About Us – Our Air Filters

Providing innovative air filters, equipment protection solutions and surgical face masks since 1957, Permatron is a privately owned company located in a suburb of Chicago. Acquired by Rensa Filtration (formerly known as Air Filtration Holdings, LLC)  in 2017, Permatron became part of a premier air filtration business, led by industry leader Brandon Ost. Rensa invests in innovation and the people that drive it to manufacture and market best-in-class solutions that keep environments safe and industries thriving.  The following air filter manufacturers complete our family of companies dedicated to delivering innovative air filtration technologies to put your company one step ahead.

  • RoboVent – manufacturer of industrial ventilation and filtration solutions
  • Viskon-Aire – manufacturer of air and paint filtration
  • D-Mark  – manufacturer of molecular filtration products
  • Air Filters Inc – manufacturer of pleated air filters, fore-market HVAC/HEPA housing and HEPA  filters
  • Custom Filter LLC – manufacturer of specialty HEPA and ULPA level filtration products

By partnering with Permatron, your business is able to respond to the changing demands of the air filtration and equipment protection industry. Take a look at our Line Card.

High Quality Air Filters

Over the years, Permatron products have earned a reputation for reliability and superior performance.   Permatron has spent over 60 years specializing in custom value-added, application driven air filter solutions for leaders in facilities management, HVACR equipment design and service, original equipment manufacturer and HVACR wholesale distribution industries. Our air filters assure you of the highest standards of quality and performance.  They are independently tested using standards of the American Society of Heating, Refrigerating and Air Conditioning Engineers and classified with Underwriters Laboratories  As To Flammability Only.

Original Electrostatic Air Filters

The first washable electrostatic air filters were designed by Permatron for use in high dirt load environments, and the leading designer of equipment protection external prefilter screens for use on commercial and industrial air intakes.  Since then, we have designed and produced custom air filters for thousands of satisfied customers by meeting their specifications and performance needs. Permatron produces widely used industry standard washable air filters of metal mesh, polypropylene and a variety of other synthetic media.  No matter the product, Permatron has a customer focused commitment to quality and service that sets the standard in air filter manufacturing.

Custom Air Filters

Our design, as well as manufacturing capabilities, allows us to work with you to develop high volume OEM air filtration parts or one-time effective air filter solutions to an irritating HVAC application on a contractor’s jobsite. We can easily produce discontinued or hard-to-find replacement air filters.

Our manufacturing capabilities include a variety of metal forming, fabricating and assembly processes.  These include contour roll forming in a variety of thicknesses and configurations.  We produce air filters framed in a variety of materials which include ultrasonic welding,  plastic, vinyl, aluminum, galvanized, painted and stainless steel.  Additional machining operations, such as notching, slotting, punching, embossing, curving and coiling can be customized by developing tooling and dies to meet customer specifications.  Media handling operations include cutting, pleating, laminating and fabric layering a diverse range of synthetic permanent and washable electrostatic media.  Synthetic media substrates can also be impregnated with finely ground coatings, such as activated carbon for odor/fume/gas removing applications.  Finished product capabilities include assembly, bulk shipping, customer packaging or private labeling.  JIT OEM inventory and delivery systems are an integral part of every job that we process.

Commercial Air Filters & Industrial Air Filters

Our air filter solutions have ranged from 4,000 square inch electrostatic cooling tower filters to 3″ x 31″ fresh air inlet PTAC filters; 1/8″ thick bonded aluminum fresh air intake filters for cellular towers or 1″ thick polyester media mist eliminators that keep beer foam from splashing on and damaging costly equipment in a brewery; heavy electrostatic particulate filtration in manufacturing plants to protective shielding from outdoor elements and bleachable plastic HVAC filters for use on cruise ships. We offer a variety of air intake filter mounting kits for easy and secure installation, as well as pull tabs and frame handles, for easy filter access.

Electrostatic Air Filters

Our electrostatic residential air filters, available to homeowners through a variety of retail mail order catalogs and websites, or their local heating and air conditioning contractor, include washable, electrostatic allergy relief air filters, vent filter media, electronic air cleaner prefilters and afterfilters, computer air inlet filters and appliance filters. Today, the widespread awareness of indoor air quality and the need for preventative equipment maintenance and GREEN energy efficient efforts presents exciting opportunities in the air filtration industry. Permatron’s proven air filtration leadership strength, engineering excellence and enthusiasm for new challenges, allows us to successfully meet the demands of a growing industry.

Electrostatic Air Filters
Electrostatic Air FiltersPermanent and washable, available in custom sizes and configurations.
PreVent Air Intake ScreensCustom sized to fit the outside air intake of any type of equipment.
Gardner Denver Industrial Compressor
Air Intake Equipment ProtectionIncrease energy efficiency, reduce maintenance and downtime.
pleated filters
Custom Air FiltersDesign, manufacture and JIT delivery capability.
PreVent Installation on Carrier Chiller
Custom Air FiltrationNo minimum order size and fast order turnaround.

Accredited & Proud Members Of:

Rensa Filtration Announces Acquisition of Air Filters, Inc.

CHICAGO, ILLINOIS – November 30, 2020 – Rensa Filtration, a family of filtration companies that manufacture best-in-class air filtration products, acquired Texas based Air Filters, Inc. (AFI). AFI is a full-line filtration manufacturer with over 65 years of experience servicing industries from airports and automotive to medical and museums.

AFI specializes in custom and high-volume manufacturing to meet any air filtration need, from filters to custom parts. Products include pleated air filters to HEPA filters as well as a complete line of Aire-Loc™ fore-market metal HVAC and HEPA housings. AFI’s pleated air filters–including the patented Expand-A-Pleat™—round out Rensa Filtration’s portfolio, making Rensa a turnkey supplier of high-quality, innovative air filtration products.  “AFI is an exceptional filtration company that shares Rensa’s commitment to outstanding service, continuous improvement and product innovation,” said Brandon Ost, CEO of Rensa Filtration. “By bringing AFI into our family, Rensa is now a onestop filtration shop servicing all of our customers’ needs.”

“Joining forces with Rensa is a tremendous opportunity to complement our capabilities and to benefit from the depth of experience Brandon and his team bring,”
said Anthony Dimicelli, President and CEO of AFI. “Together we will produce even more innovations, more new ideas, and more new products for our customers, and
that is what will take AFI to the next level.” AFI is Rensa’s fifth acquisition since its inception in 2017. Other members of the Rensa family include Maryland-based Viskon-Aire®, Illinois-based Permatron®, Michigan- and Ohio-based RoboVent® and Michigan-based D-Mark, Inc®. Rensa will continue to look to add high-growth companies that are interested in being part of a family of leading-edge filtration suppliers.

Rensa Filtration acquires carbon filter specialist D-Mark

Rensa Filtration (formerly known as Air Filtration Holdings LLC) has bought Michigan-based D-Mark Inc, a manufacturer of molecular filtration products and proprietary owner of CarbonWeb® media and OdorGuard® products used in odour, gas and particulate removal applications.

D-Mark’s products include panels, pads, pleats, pleat inserts, rigid cells, ring panels, CarbonWeb roll media, “filled” filters for v-banks, bulk carbon and other filters for appliances and air cleaners.

“D-Mark’s ability to manufacture nonwoven carbon filled filter media is exciting and allows us to continue to expand the innovative product portfolio of Rensa Filtration,” said Brandon Ost, CEO of Rensa Filtration. “D-Mark founder and president, James Kasmark, has built an exceptional company with a reputation for advancing carbon technology to address customer needs with molecular filtration.”

“I knew that when it was time for me to sell my company I wanted the new owners to have a passion for filtration. I have known Brandon for many years and it is an excellent fit,” said Kasmark. “Combining the patented CarbonWeb process and technology with Rensa’s energy and spirit for innovation, along with a proven track record of the management team to introduce new products to the filtration market provides D-Mark the tools necessary to reach new levels.”

This is Rensa Filtration’s fourth acquisition in the last 15 months. Previous acquisitions include Viskon-Aire, Permatron and RoboVent. Rensa Filtration, which was founded in 2017 by industry veteran Brandon Ost and private investment partners, says that it will continue to look to grow through acquisitions.

2018 Business Excellence Award

Each year, the community of Elk Grove Village nominates and recognizes manufacturers for excellence in Community Support, Sustainability, Innovation, and Industrial Development of the Year. Permatron has proven to be ‘Beyond Business Friendly’ by not only manufacturing exceptional products but also being a valuable asset to the Elk Grove Village community.

Representing Excellence in Sustainability, Permatron Corporation has spent 60 years designing and manufacturing air filtration solutions that reduce the environmental and economic impacts associated with excessive energy usage, growing landfill challenges and airborne pollutant control. The recent acquisition of Permatron by the Rensa Filtration family of companies, has further accelerated our mission to manufacture and market best-in-class sustainable air filtration solutions that keep people and environments safe and industries thriving.

Craig B. Johnson, mayor of Elk Grove Village, announced the winners at the awards ceremony during the Made in Elk Grove Manufacturing Expo luncheon. A special thanks to Deputy Governor Leslie Geissler Munger for congratulating Brandon Ost, CEO of Rensa Filtration and Leslye Sandberg, CEO of Permatron Corporation as they came on stage.

Led by industry leader Brandon Ost, Rensa Filtration makes its third acquisition since launching in 2017

Rensa Filtration (formerly known as Air Filtration Holdings LLC) a family of companies dedicated to air filtration, announced February 2, 2018 that it, along with partners The Edgewater Funds and Duchossois Capital Management has acquired RoboVent, a leading provider of industrial ventilation and filtration solutions.  RoboVent (www.robovent.com) is Rensa’s third acquisition including Maryland-based Viskon-Aire (www.viskon-air.com), a leading manufacturer of air filtration products and Illinois-based Permatron, a provider of custom, technology-driven air filtration solutions with over 60 years of experience.

Founded in 1989, RoboVent has established itself as leader in the field of air filtration solutions with highly efficient, reliable and cost-effective systems installed at major  manufacturing operations across North America.  RoboVent designs and manufactures air filtration solutions for welding, metal cutting; dust collection and lubricant mist collection; and general ventilation.  Headquartered in Sterling heights, Michigan, RoboVent has sales and service centers located throughout North America.  In 2014, the same year that RoboVent celebrated its 25th anniversary, it was named one of Inc. 5000 America’s Fastest-Growing Private Companies.

Permatron becomes part of Rensa Filtration

Edgewater Funds, Duchossois Capital Management and Brandon Ost announced they have collectively acquired Permatron in September 2017.

Founded in 1957, Permatron has spent 60 years specializing in custom value-added, application driven air filter solutions for leaders in facilities management, HVACR equipment design and service, original equipment manufacturers, and wholesale distribution industries.

Permatron works with customers in the design and manufacture of air filter components to their precise specifications so they can be integrated and performance-matched for any application.  Modeled on ISO9000 processes, the company maintains very high standards of manufacturing and customer satisfaction.

Brandon Ost stated, “We are excited to work with Leslye Sandberg to continue and expand Permatron’s long standing tradition of product innovation and engineering excellence to meet the changing needs of the air filtration and HVACR industries. Permatron is uniquely positioned to be a critical piece of the overall strategy to compete at the world class level of air filtration focusing on changing customer demands for air purity.”

Leslye Sandberg noted, “Permatron’s reputation is built on creative product innovation, specializing in design build, short lead times for custom products and JIT production. As customer requirements expand, so do Permatron’s capabilities.  All of our employees are excited about the ability to grow our manufacturing capabilities as well as partner with a group of exceptional filtration companies in support of our customer focused strategy.”

Dave Tolmie, Partner with Edgewater Funds stated, “We are excited to have completed our second acquisition this year and one that accelerates our strategy of bringing innovative and unique products to market.  Ms. Sandberg has done a great job growing Permatron and we are excited to partner with her.”

About Brandon Ost

With over 25 years in the filtration business, most recently as CEO of Filtration Group, Brandon’s mission is to capitalize on new and emerging technologies and, apply these solutions to real world filtration problems facing distributors and end users worldwide.

About Edgewater Funds

The Edgewater Funds is a Chicago-based private equity firm with $2.7 billion in committed capital. Through Edgewater Growth Capital Partners, we partner with management to help accelerate growth in their business. Edgewater focuses on funding high quality middle market companies where we can add substantial value through capital, our experience and our broad network. Edgewater leverages the experiences of its Partners and Executive Advisory Board who have distinguished themselves as successful CEOs and business leaders.

About Duchossois Capital Management

Duchossois Capital Management is a privately held, family owned investment company that creates long term value by applying its extensive industry knowledge, operational expertise and permanent capital base to a variety of investment opportunities. DCM invests in a wide array of asset classes including private and public companies, private investment funds and real estate. For more information, visit www.dcmllc.com.

Leslye Sandberg appointed as ASHRAE SSPC 52.2 Secretary

ASHRAE develops standards for both its members and others professionally concerned with refrigeration processes and the design and maintenance of indoor environments.  The Standing Standards Project Committee (SSPC) 52.2 is the ASHRAE Committee charged with ongoing improvements to Standard 52.2 “Method of Testing General Ventilation Air Cleaning Devices for Removal Efficiency by Particle Size.” The Committee meets twice each year at the summer and winter ASHRAE meetings prior to the start of the ASHRAE Conference.  Participation at the meeting is open.  The appointment is effective July 1, 2017.  Leslye Sandberg is the Chief Executive Officer of Permatron Corporation.

BUILDINGS Awards PreVent Fan Guard Filter Top Money-Saving Product

Permatron Corporation is proud to announce that BUILDINGS has selected PreVent Fan Guard Filters as a 2016 Money-Saving Product winner, HVAC Fixes. This product is a member of an elite group of 76 products showcased in the June 2016 issue of BUILDINGS and online at www.BUILDINGS.com.

BUILDINGS Awards HailStop Hail Guard Netting Top Money-Saving Product

Permatron is proud to announce that BUILDINGS magazine has selected HailStop® Hail Guard Netting as a 2015 Money-Saving Product winner in the HVAC Fixes category. HailStop® Hail Guard Netting is part of an elite group of 83 products showcased in the magazine’s June 2015 issue.

Permatron joins ICSC: International Council of Shopping Centers

The purpose of ICSC is to advance the shopping center industry and to promote its role in the commercial distribution of consumer goods and services. In November 2014 Permatron became a proud member of ICSC. We will also be exhibiting at the upcoming show in December 2014 in Phoenix, Arizona.

BUILDINGS Awards PreVent Model R Air Intake Filter Top Money-Saving Product

After reviewing hundreds of submissions, BUILDINGS editorial staff selected an elite group of 2014 Money-Saving Product winners.  Facility management can save money on energy, lifecycle, maintenance and water costs — these budget-friendly solutions will benefit your bottom line. Made of washable polypropylene, this innovative and patented air intake filter attaches to the outside of steel air intake louvers with magnets for easy maintenance accessibility.  Testing showed a five-year cumulative savings of $18,284 compared to disposable polyester air filter pads. Read the whole article in the June 2014 issue of BUILDINGS Magazine.

HVACR Distribution Business Features Permatron in Manufacturer’s Spotlight

Change the filter.  It might be the mantra for the HVACR industry and one that we always share with consumers.  But Elk Grove Village, IL-based Permatron has developed patented features for its line of air filters.  They are also an object lesson of how a company develops a niche in the HVACR industry over decades and still stays on top. Read the complete article…

Leslye Sandberg, Inducted into the Chicago Area Entrepreneurship Hall of Fame

CHICAGO, IL (March 15, 2011) Leslye Sandberg, will be inducted into the Chicago Area Entrepreneurship Hall of Fame at its 27th Anniversary Gala Celebration.  Ms. Sandberg is being recognized for her entrepreneurial achievements and making a lasting impact on Chicago’s business landscape. The Institute for Entrepreneurial Studies at the University of Illinois at Chicago will host the event at the Chicago Hilton. “As an entrepreneur, there is no greater achievement than seeing your business succeed and maintaining its longevity, especially in a challenging economy,” said Leslye Sandberg, President, Permatron Corporation. “It is a great honor to be recognized by the Chicago Area Entrepreneurship Hall of Fame and the Institute for Entrepreneurial Studies for my life’s work.” Ms. Sandberg purchased a small family business and turned it into a nationally recognized manufacturer with several notable product brands. Ms. Sandberg has extensive experience in the design and building of air filtration products for multiple disciplines, utilizing her background in research, product development and manufacturing process and process improvement.

Permatron Wins Manufacturer of the Year Award

The Alliance for Illinois Manufacturing (AIM) and its sister organization NORBIC presented Permatron Corporation with their Manufacturer of the Year Award.   A collaboration of government-sponsored business development centers, a membership alliance organization for Northern Illinois business and the professionals who serve them, both Alliance and NORBIC help to provide local companies with the tools they need to grow and sustain their business. Both organizations are non-for-profit, and NORBIC has been an industry leader for over 30 years.

RSES Awards PreVent Filter Reader’s Choice Winner

RSES Journal’s third annual Readers’ Choice Awards were presented during the AHR Expo in Orlando, FL, Jan. 25-27, 2010.  As in previous years, the 2009 Readers’ Choice Award winners were chosen by RSES Journal’s readers in the form of inquiries sent via mail, fax and online to a third party reader.   Winners were featured in the Journal’s March 2010 issue. RSES’ Website features all winners.

BUILDINGS Awards PreVent Filter Top Money-Saving Product

Astute selection of building products can save money in a number of ways:  initial cost, life-cycle cost, sustainability, longevity, energy efficiency, occupant productivity, and maintenance requirements.  The BUILDINGS magazine editorial staff considered all of these criteria to cull this group of 81 high-performance products.   Their staff chose PreVent® Equipment Protection Filters as one of their Top 81 Money-Saving Products  featured in the June 2010 issue of the magazine. Buildings.com featured all winners.