Frequency of Inspections

Ben, A lot of the ongoing commissioning items typically feed into a buildings normal operating plan. Checking calibration of thermostats, confirming supply temperatures, confirming functionality of lighting controls... Are the retro-commissioning items you are referring to similar to an outside air balance or another larger maintenance service?

I'm not sure a 3rd party is required for this credit. It does ask that the commissioning team take a systems wide approach that is beyond the normal operation and maintenance scope. If the operations staff contracts with a 3rd party to perform a detailed functional testing every 2 years it will certainly add great value by helping to calibrate the ongoing commissioning testing that is being performed as part of the operating plan. It should be noted that the ongoing functional testing piece of the commissioning process can be automated through a buildings BMS system. Check out this article for a case study: http://resources.cacx.org/library/holdings/050.pdf.