CxA for Enhanced...

Dear Jean, thanks for that, I have read the table at page 221 of LEED BD+C. I just want a more precise answer. Can we be CxA for either case 1) r 2)? Plus, do the infrastructures services(around the building project) need to be part of the commissioning? Thank you.

Fabio, infrastructure around the building does not have to be commissioned for EAp1. See the credit language for details on the Cx requirements.

Jean, Wouldn't you say yes to both case 1 and case 2 for fundamental commissioning?

The technical answer to questions 1 and 2 is "yes" for fundamental commissioning. The real world situation is that the CxA should not be influenced by, or have a conflict with, the design or construction team members. Although it is alowed for Fundamental Commissioning, I would propose that any employee of the architecture, MEP, or constuction firm has a potential conflict as a commissioning agent. The infrastucture question has a lot to do with what you call infrastucture. If there is a central utility that feeds the project and it is part of the "infrastucture", you will need to ensure it is commissioned as part of enhanced commissioning. Although it is slightly outdated, there is guidance in this document http://www.usgbc.org/ShowFile.aspx?DocumentID=4176.

Thanks Jean. I agree with both you and Chris. Enhanced commissioning has a triple bottom line return on investment and should be seriously considered on all LEED projects. "Organizations that have researched commissioning claim that owners can achieve savings in operations of $4 over the first five years of occupancy as a direct result of every $1 invested in commissioning—an excellent return on investment." http://www.wbdg.org/project/buildingcomm.php