Types of Commissioning

 

 CxRetroCxReCx
Application New Construction Existing buildings that have never been commissioned or whose age or operational changes have rendered the original building design and intent inadequate or inappropriate. Existing buildings that have been commissioned or retrocommissioned
Timing Before occupation. Occurs in response to problems or under-performance of building systems. Occurs periodically, ideally as part of the O&M schedule.
Purpose Ensures building systems will perform optimally. Solves problems that have been preventing the building from operating optimally. Ensures building is still operating optimally, i.e., ensures commissioning results persist.
Frequency Once Depends on building age and upkeep, but generally, once every 10 to 15 years. Every 3 to 5 years.
Cost* Varies according to size of building and complexity of systems: $0.50 to $3.00 per sq. ft. $0.05 to $0.40 per sq. ft. Additional data are needed to help pinpoint costs based on specific building features and the scope of the RCx effort. Lowest cost option for existing buildings and systems.


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