A dark blue trapezoid with a narrow bottom and wide top against a black background.A dark blue trapezoid with a narrow bottom and wide top against a black background.
Abstract geometric design with a black background and white lines converging towards the center, forming a V-shaped pattern.Abstract geometric design with a black background and white lines converging towards the center, forming a V-shaped pattern.
Triangular shape with a sharp, pointed end at the right over a white background, creating a stark contrast.Triangular shape with a sharp, pointed end at the right over a white background, creating a stark contrast.

Engineer to Order: Purpose-Built OEM Filtration for OEM Applications

When standard filters won't do, Rensa’s Engineer to Order process delivers solutions designed from the ground up. We partner with OEMs to engineer custom OEM filtration solutions that integrate seamlessly into your equipment, meeting your specs, performance targets, and compliance needs.

Engineering capabilities that scale with your product

Our Engineer to Order capabilities give OEMs the precision, flexibility, and proof they need to bring custom OEM filters from concept to reality.

Testing

Filters aren’t just built, they’re proven. We run them through HEPA and ULPA checks as needed, measure efficiency and pressure drop, and tie every result back to lot data so performance is documented, not assumed.

Pleating

The pleat defines the air movement through your system. Our lines handle everything from pleats to mini-pleats to V-banks, producing packs that hit capacity and efficiency targets while slotting into your design without rework.

Die Cutting

No two designs are alike. We cut pleated or layered media into precise shapes and sizes, whether it’s a quick prototype or a high-volume run, so your filter fits the application exactly.

Ultrasonic Welding

Seals are where filters succeed or fail. With ultrasonic welding, we lock multilayer composites and complex shapes into airtight seams that prevent bypass and keep performance intact.

Engineered Production Lines

Standard processes don’t always fit. We build lines around the filter itself, integrating pleating, welding, assembly, and automated testing to produce consistency at any scale.

Plastic Molding

Some filters need more than media. Our injection and insert molding capabilities create housings and frames that match your geometry, giving you a component built for your product from the start.

Molecular & Gas Phase

Handling gases takes more than dropping carbon in a frame. We load media with advanced methods that keep distribution even, prevent channeling, and give the filter stable performance and longer life.

Engineering capabilities that scale with your product

Our Engineer to Order capabilities give OEMs the precision, flexibility, and proof they need to bring custom OEM filters from concept to reality.

Testing

Filters aren’t just built, they’re proven. We run them through HEPA and ULPA checks as needed, measure efficiency and pressure drop, and tie every result back to lot data so performance is documented, not assumed.

Pleating

The pleat defines the air movement through your system. Our lines handle everything from pleats to mini-pleats to V-banks, producing packs that hit capacity and efficiency targets while slotting into your design without rework.

Die Cutting

No two designs are alike. We cut pleated or layered media into precise shapes and sizes, whether it’s a quick prototype or a high-volume run, so your filter fits the application exactly.

Ultrasonic Welding

Seals are where filters succeed or fail. With ultrasonic welding, we lock multilayer composites and complex shapes into airtight seams that prevent bypass and keep performance intact.

Engineered Production Lines

Standard processes don’t always fit. We build lines around the filter itself, integrating pleating, welding, assembly, and automated testing to produce consistency at any scale.

Plastic Molding

Some filters need more than media. Our injection and insert molding capabilities create housings and frames that match your geometry, giving you a component built for your product from the start.

Molecular & Gas Phase

Handling gases takes more than dropping carbon in a frame. We load media with advanced methods that keep distribution even, prevent channeling, and give the filter stable performance and longer life.

How custom filters move from idea to production

From first sketches to full production, our process is designed to meet you where you are, aligning engineering with manufacturing so your filter works as intended, at scale.

Why engineer a custom filter for commercial, medical or industrial OEM applications?

Every product starts with a vision. When you’re building new equipment, your filter should push that vision forward—not hold it back. Our Engineered to Order solution makes sure performance, compliance, and design stay aligned.

blue circle with check
Fill the gaps off-the-shelf filters leave.

When a standard product doesn’t work, we build one that does, tailored to your exact dimensions, tolerances, and performance requirements.

blue circle with check
Make equipment perform better.

Custom filters improve efficiency, extend component life, and reduce downtime, solving complex OEM equipment filtration challenges and helping your equipment deliver at its best.

blue circle with check
Solve the "forgotten filter” problem.

Many OEMs only realize an air filter is needed late in the design process. We fill that hole with solutions that fit seamlessly into their systems, avoiding redesigns or last-minute compromises.

blue circle with check
Flexible where you need us.

Whether you’re still prototyping or ready to scale production, we adapt to your stage in the development process.

blue circle with check
Get deeper design support.

Engineer-to-order projects bring a higher level of collaboration, with our experts helping you balance airflow, resistance, manufacturability, and compliance.

Why engineer a custom filter for commercial, medical or industrial OEM applications?

Every product starts with a vision. When you’re building new equipment, your filter should push that vision forward—not hold it back. Our Engineered to Order solution makes sure performance, compliance, and design stay aligned.

blue circle with check
Fill the gaps off-the-shelf filters leave.

When a standard product doesn’t work, we build one that does, tailored to your exact dimensions, tolerances, and performance requirements.

blue circle with check
Make equipment perform better.

Custom filters improve efficiency, extend component life, and reduce downtime, solving complex OEM equipment filtration challenges and helping your equipment deliver at its best.

blue circle with check
Solve the "forgotten filter” problem.

Many OEMs only realize an air filter is needed late in the design process. We fill that hole with solutions that fit seamlessly into their systems, avoiding redesigns or last-minute compromises.

blue circle with check
Flexible where you need us.

Whether you’re still prototyping or ready to scale production, we adapt to your stage in the development process.

blue circle with check
Get deeper design support.

Engineer-to-order projects bring a higher level of collaboration, with our experts helping you balance airflow, resistance, manufacturability, and compliance.

A white right pointing arrowbackground imageA white left pointing arrow
A white right pointing arrowbackground imageA white left pointing arrow

Here’s what makes Rensa different

When it comes to custom filtration, experience and execution matter. Rensa brings together decades of engineering knowledge, full in-house capabilities, and the agility to deliver on your timelines.

Why partner with Rensa?

Because every filter solution we design is backed by collaboration, speed, and reliability—ensuring you get more than a product, you get a true partner.

Built on decades of experience

Our combined history spans across APC Filtration, Custom Filter, and RP Fedder, bringing deep expertise in custom design and engineered solutions across medical, industrial, and commercial markets.

Lead times that work with you

From prototyping to full production, our processes are built for speed and precision. Filters arrive ready for your line, keeping your builds and launches on schedule.

A true end-to-end partner

From discovery through delivery, our engineer, sales and production teams work alongside your team to design, validate, and manufacture filters that meet your exact needs.

Everything under one roof

At Rensa, design, prototyping, testing, and production aren’t siloed. Our teams sit side by side, solving challenges in real time so filters move from idea to build without delays or handoffs.

A hand clapping on a gray background.
Partnership built into every design

We start by understanding your specs and challenges, then design past them. The goal isn’t just a filter; it’s to solve the problem and support you as your product evolves.

Why partner with Rensa?

Because every filter solution we design is backed by collaboration, speed, and reliability—ensuring you get more than a product, you get a true partner.

Built on decades of experience

Our combined history spans across APC Filtration, Custom Filter, and RP Fedder, bringing deep expertise in custom design and engineered solutions across medical, industrial, and commercial markets.

Lead times that work with you

From prototyping to full production, our processes are built for speed and precision. Filters arrive ready for your line, keeping your builds and launches on schedule.

A true end-to-end partner

From discovery through delivery, our engineer, sales and production teams work alongside your team to design, validate, and manufacture filters that meet your exact needs.

Everything under one roof

At Rensa, design, prototyping, testing, and production aren’t siloed. Our teams sit side by side, solving challenges in real time so filters move from idea to build without delays or handoffs.

A hand clapping on a gray background.
Partnership built into every design

We start by understanding your specs and challenges, then design past them. The goal isn’t just a filter; it’s to solve the problem and support you as your product evolves.

A white right pointing arrowbackground imageA white left pointing arrow
A white right pointing arrowbackground imageA white left pointing arrow

Build better air quality into your products

Build better air quality into your products

Our end-to-end OEM services support you from early design concepts through full production and compliance. Every piece of equipment has its own demands. Let’s build a filter that keeps air clean and systems running smoothly.