CUSTOM FILTER | A RENSA FILTRATION COMPANY
Custom Filter is a leading manufacturer of custom air filters, providing a wide range of filter solutions for OEMs needing high purity air filtration solutions, including custom, specialty, and niche filters.
Joining Rensa Filtration in 2021, Custom Filter brings its specialty HEPA and ULPA level filtration products to Rensa’s custom designed and engineered filtration portfolio.
Custom Filter is headquartered at 2300 Raddant Rd., Ste 100, Aurora, IL, 60502, and can be contacted directly at 630-906-2100 or at sales@customfilter.net.
CUSTOM FILTER | A RENSA FILTRATION COMPANY
Custom Filter: Custom Designed & Engineered High Purity Air Filters
Custom Filter is a leading manufacturer of custom air filters, providing a wide range of filter solutions for OEMs needing high purity air filtration solutions, including custom, specialty, and niche filters.
Joining Rensa Filtration in 2021, Custom Filter brings its specialty HEPA and ULPA level filtration products to Rensa’s custom designed and engineered filtration portfolio.
Custom Filter is headquartered at 2300 Raddant Rd., Ste 100, Aurora, IL, 60502, and can be contacted directly at 630-906-2100 or at sales@customfilter.net.
With more than 20 years in business and 80 years of combined filtration experience, Custom Filter has earned a reputation as a go-to partner for OEMs tackling complex, high-stakes applications — from surgical suites to military use to planetary exploration.
Custom Filter brings a concept-to-reality approach to every engagement, drawing on a combination of proprietary manufacturing methods, advanced engineering tools, and extensive in-house testing capabilities to deliver solutions that are both technically precise and cost-effective. We partner with OEMs and their teams of innovators, engineers, and designers to provide unique air filtration solutions. Custom Filter is structured to support low-volume and prototype-stage programs — not just high-volume production runs — making it a practical partner at every stage of OEM product development.
Having cultivated a strong network of strategic partnerships with filtration companies, test labs, design firms, and suppliers — Custom Filter gives OEM customers timely access to emerging technologies and accelerating speed to market.
Custom Filter operates under an ISO 9001:2015 certified quality management system, with quality programs and processes built to meet the demands of the most regulated and performance-critical industries.
Now a part of Rensa's Custom Air Filter Design — our dedicated OEM engineering practice — together, we give customers access to a broader network of filtration manufacturers, engineering resources, and supply chain capabilities under one roof.
From prototype to production, this guide walks OEM engineers through Rensa's two pathways to custom filter manufacturing — Engineer to Order and Configure to Order — covering co-design, compliance validation, and what to look for in a partner that can take you from concept to launch under one roof.
Custom Filter's engineering and manufacturing capabilities are available through Rensa Custom Design — Rensa's dedicated practice for OEMs that need more than an off-the-shelf solution. Whether you're early in the design process or replacing a supplier mid-program, Custom Design connects you with the right filtration engineers, the right materials, and the right process from day one.
We needed a co-development partner, not just a supplier. They engaged early, worked through design constraints with us, and delivered a validated solution with the documentation our FDA submission required.
Engineering Director, Medical Device OEM
USA
Our previous supplier couldn't prototype or iterate with us. Samples came back fast, tested to spec, with a supply chain we could count on through launch and beyond.
Product Manager, Industrial Equipment Manufacturer
USA
The depth of engagement was what impressed us most — they understood our system, not just the filter, and helped us optimize airflow, reduce noise, and extend service life.
VP Engineering, Specialty OEM Equipment
USA
If you're an OEM engineer or product manager working on a device or system that requires high-purity, custom-engineered filtration, we’re happy to partner with you on it. Tell us about your project and our sales and engineering teams will follow up to discuss your custom filter manfuacturing requirements.
