CDI Curb Adapters

CDI Curb Adapters

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As the leading manufacturer of HVAC curb adapters and accessories, CDI is defined by speed and a commitment to excellence.

We maintain facilities in Minneapolis, Dallas, Seattle, Charlotte, and Phoenix to ensure we remain the fastest in the industry. CDI Story - The O'Brien Family Business

The story of CDI is a classic business success story. In April 1994 Entrepreneur Pat O'Brien created Crystal Distribution Inc. It started out as a manufacturer's rep selling Dampers, Louvers and Ductwork accessories to contractors

06/16/2026

Manufacturing custom HVAC curbs has a lot of moving parts, but our department specialists stay in tune with each other to work towards a goal of delivering on-time, correct & complete.

With five locations across the U.S., we work as one unit to share knowledge and solve challenges in real-time. Whether it’s lifting heavy or sharing technical expertise, our nationwide team is always ready to lend a hand to ensure your project stays on schedule.

06/13/2026

How should you be treating Ai results?

06/12/2026

Friday's intern spotlight is all eyes on Thomas! Thomas is a Drafting Intern this summer joining us from Rose-Hulman Institute of Technology! He is most excited about learning more about SolidWorks, and learning about optimizing for manufacturability.

We asked him what sparked his interest in this field, and this is what he had to say: "I have always been curious about mechanisms and understanding how things work, specifically I would say my interest in bicycles sparked my interest in mechanical engineering."

Thomas, we can't wait to see what you learn this summer. Welcome to the CDI team!

Photos from CDI Curb Adapters's post 06/11/2026

This week, our CDI interns got the chance to head to the roof for some hands-on learning! Brian Renfro Sr took the group up to observe a field measure firsthand, giving them a closer look at the process in action.

Our Director of Engineering, Mark, also brought the interns onto our OWN CDI rooftop to check out our economizers and get a feel for what our team in Plymouth is building.

We can’t wait to give them more experiences like this! Hopefully after the heat wave dies down. Any guesses on how hot it was on this rooftop?

06/09/2026

Another day, another CDI Intern Spotlight! Evan joins us from Minnesota State University - Mankato where he is majoring in Marketing & Sales. Evan is our only sales support intern of the summer! He is excited to get real-world experience and learn about sales as well as learn about the CDI team. He's currently listening to Long Live by Florida Georgia Line on repeat and if he were to win the lottery, he would buy a Pavati Wakeboat (am I sensing a theme here?) Congrats on your start with us, Evan — we can't wait to watch you grow this summer!

06/08/2026

Congratulations to our Dallas Employee of the Month, Danny Bensend!

Danny is one of our 1st shift Machine Operators in Dallas! He started with us in late March and he has already gone above and beyond. Any time Danny is asked to take on a task or project, he is always willing to help out! He is a hard worker and always looking for ways to help out outside of his own work.

06/06/2026

A curb adapter on top of a curb adapter?

06/05/2026

It's another Intern Spotlight Day! Finn O. is interning with us this summer as a Drafting Intern! He is most excited about learning how to draw curbs this summer during his internship. We asked Finn what the most ridiculous thing he would buy was if he won the lottery. He told us he would buy the biggest boat he could find. Make sure to invite your CDI team out for a ride when that happens!!

06/02/2026

Innovation is at the heart of everything we do at CDI.

Our state-of-the-art technology allows us to design and manufacture curb adapters with unmatched precision, efficiency, and consistency. From advanced fabrication equipment to automated measuring and cutting systems — every tool we use helps us deliver superior quality and faster turnaround times for our customers.

Technology drives our process, but it’s our people who bring it to life.

06/01/2026

Congratulations to our Minneapolis Employee of the Month, Jacob Shore!

Jacob has been working with us for only a few weeks and he has been killing it! He has already participated in two volunteer events on top of doing an excellent job out in the shop as an insulator! We are so excited about his potential at CDI!

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Elk River, MN

Opening Hours

Monday 5am - 11:59pm
Tuesday 12am - 11:59pm
Wednesday 12am - 11:59pm
Thursday 12am - 11:59pm
Friday 12am - 11:59pm
Saturday 12am - 5am