Curb Adapters

Mate any existing roof curb to any new commercial HVAC unit.
No roofer required!

1) Remove the old HVAC unit.
2) Set the adapter onto the curb.
3) Install the new HVAC unit.
Curb Adapter Animation


  • One piece welded
  • Heavy gauge galvanized steel
  • Fully insulated
  • Supply transitions installed
  • Welds sprayed for rust prevention
  • Designed for low static


  • Horizontal supply / return
  • Vibration isolation
  • Filters
  • Wind / seismic
  • Zone dampers
  • Acoustical
  • Lifting lugs
  • Custom design
Curb Adapter Photo

Are all curb adapters created equal?

The truth is, inexpensive curb adapters may be costing you more than you think. Most manufacturers design their curb adaptors without considering what is best for airflow. They plenumize the adapter which causes static pressure to rise and as a result causes airflow problems as well as well as reduces energy efficiency. Use Cambridgeport adapters and know you are getting a high quality retrofit product everytime!