RetroCommissioning Process

/ Commissioning Processes

The purpose is to redo the Commissioning of older buildings.

Over time, the Heating, Ventilating and Air Conditioning (HVAC) systems in older buildings cannot seem to maintain a comfortable environment and/or energy costs have risen significantly over time.  In situations like this, it is very common to find that problems have accumulated over time.  Examples of problems found on aging systems:

  • Lack of overall maintenance
  • Sensors and Thermostats need calibrating
  • Variable Air Volume boxes not working properly
  • Simultaneous heating and cooling
  • Cooling Coils, Condenser Coils, Heating Coils, Fan Blades need to be cleaned
  • Energy Management System (EMS) sub-routines need to be re-enabled or modified
  • Distribution Systems (Air and Water) need to be re-balanced
  • Loose belts, leaky valves and low refrigerant charges


  • Improves Comfort Conditions
  • Improves Reliability
  • Lowers Energy Costs
  • Re-furbishing existing equipment can add years to the life of systems
  • Saves on Capital Expense - RetroCommissioning is less expensive than replacing equipment



Another reason for RetroCommissioning is, over time there may have been changes made to how a facility is being used. In these cases, Star Service may recommend upgrading an existing system or selecting equipment replacements engineered to the new facility layout and type of use.

There may also be benefits to installing new systems because of attractive Return On Investment (ROI) opportunities for tax credits or grants that are available from Local Government, the Federal Government or local Utility companies.

7425 Major Street
Houston, TX 77061
Toll Free: 866-236-STAR
Office: 281-481-0700
Fax: 281-481-8650

117 Pintail Street
St. Rose, LA 70087
Office: 504-443-7637
Fax: 504-443-7654
328 Elton Road
Jackson, MS 39212
Toll Free: 800-478-0486
Office: 601-373-7392
Fax: 601-373-0459

4663 Halls Mill Road
Mobile, AL 36693
Toll Free: 800-661-9050
Office: 251-661-4050
Fax: 251-661-7050
13 Palafox Place, Suite 200
Pensacola, FL 32502
Toll Free: 800-661-9050
Office: 850-559-5819
Fax: 251-661-7050

4226 East 43rd Street
North Little Rock, AR 72117
Toll Free: 833-538-2858
Office: 501-295-3245