CDI Curb Adapters

CDI Curb Adapters 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

in the Minneapolis, MN area. It didn't take long for Pat to realize that not everyone does what they say they are going to do. After missing deadline after deadline due to the manufacturers of these products, Pat had a desire to make a major change to his business. Pat decided to become a manufacturer and differentiate his company from others by doing what he said he would do and deliver on time no questions asked. The facility was a small 5,000 sq ft building, which was shared with two other companies to help with expenses. His days were spent calling on customers and he spent his nights building what was sold. Some days he sold so much product that he would have to recruit friends and family to come and work throughout the night to complete the jobs on time. By 1998 the business was experiencing success and was rapidly growing. CDI's reputation as a company built on strong values and principles and the ability to fulfill their promises continued to grow, and its market share continued to spread across much of the Midwest. Pat's wife Bobbi Jo joined the company the same year and it was then that they decided they wanted to grow a family business. By 2002 Pat had hired his father, Jim O'Brien, to be the first outside sales person and his high school friend, Mark Greenwood, to be the first engineer for CDI. Both had been part of the crew that pulled the all-nighters in the beginning. With growing customer demand for pricing catalogs and drawings, the CDI website was created. The industry's first online system was launched where customers could get quotes, drawings and email confirmations when an order was received and another one when the product was shipped. The industry loved this tool and their business exploded! Currently CDI has 4 plants strategically located across the USA in Charlotte, Minneapolis, Dallas, and Seattle providing 2-3 day maximum shipping for their customers. With the acquisition of several high tech machines, many more employees, the use of the company's innovative website and online tools, CDI has become a nationwide curb manufacturer. Today CDI is the leader in the curb adapter industry with the fastest lead times and the most adapter curbs manufactured. The values and principles that CDI was built upon are evident in every aspect of CDI. The strong desire to completely satisfy all of its customers still is at the core of CDI's mission realizing that without the continued support of its customers through all these years, the O'Briens would not have had the ability to turn their idea into reality. "We have truly achieved the goal of having a family business. Currently working at CDI is my father, Bobbi Jo's father and mother along with several other relatives and many people that have worked at CDI for so long they are part of our family. We have watched many of our employees grow from high school helpers to blessed people that are now married with a home of their own and a beautiful child or two; that's really rewarding to see." - Pat O'Brien.

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?

Friday's intern spotlight is all eyes on Thomas! Thomas is a Drafting Intern this summer joining us from Rose-Hulman Ins...
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!

This week, our CDI interns got the chance to head to the roof for some hands-on learning! Brian Renfro Sr took the group...
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?

Another day, another CDI Intern Spotlight! Evan joins us from Minnesota State University - Mankato where he is majoring ...
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!

Congratulations to our Dallas Employee of the Month, Danny Bensend!Danny is one of our 1st shift Machine Operators in Da...
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?

It's another Intern Spotlight Day! Finn O. is interning with us this summer as a Drafting Intern! He is most excited abo...
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.

Congratulations to our Minneapolis Employee of the Month, Jacob Shore! Jacob has been working with us for only a few wee...
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!

Address

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

Telephone

(763) 391-7790

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