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CDI Curbs

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.

Our focus on manufacturing curb adapters has resulted in a high quality product along with an efficient process. Annually we manufacturer more curb adapters than any other company. In 2011 we exceeded 30,000 units.


The story of CDI is a classic business success story. In April 1994 Entrepreneur Pat OÕBrien created Crystal Distribution Inc.

Primary Benefits:

The strong desire to completely satisfy all of its customers still is at the core of CDIÕs mission. Without the continued support of its customers through all these years, the OÕBriens would not have had the ability to turn their idea into reality.

CDIÕs Engineering Department has extensive experience and is ready to assist you with your curb needs. Whether you have a standard application or something completely unique, we are ready to listen and help. We pride ourselves in being able to create solutions for your most challenging projects.

Innovative Products

Many other styles/options are available:

Vibration Isolation Curbs:

Isolation Curb
Isolation Rail
Seismic Load Versions
Wind Load Versions
Straight Curbs:

Knock Down Curb
Welded Curb
Horizontal Discharge Curb
ERV/RTU Combo Curb
Exhaust Fan Curb
Seismic Versions
Wind Load Versions
Pitched Curbs:

Welded Curb
Metal Building Curb
Exhaust Fan Curb
Seismic Load Versions
Wind Load Versions
Equipment Rail
Filter Rack
Burglar Bars
Hail Guard
Coil Guard
S Clips / Hold Downs, Tie Downs w/Turnbuckle
Acoustical Package

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