Clean room project

Xavi, Modeling projects involving clean rooms can get ugly in a hurry. My advice would be to model two separate HVAC systems in the proposed design. One that solely serves the requirements of the clean room and the other serving the rest of the space, both of which use actual design values. I'd then put the exact same clean room system in the baseline design and claim no margin. The 2nd HVAC system serving the rest of the building, I'd make equal to the requirements for your building baseline according to ASHRAE 90.1-2007 Appendix G. I don't have my Reference guide with me today, so I'm not sure on the two documented project rule as far as CI is concerned. I know it's true for NC.

Don't quote me on this Xavi, but I believe it's just a narrative detailing your experience. I'll try and see if I can find out more of what's required.