Sustainability Director, PE
P2S Engineering, Inc.
LEEDuser Basic Member
48 thumbs up
Energy Engineer
CLEAResult Consulting
LEEDuser Basic Member
222 thumbs up
James,
For a TI project, the key to always remember is that you only have to account for the aspects of the building that are within your scope of work. If the VAV equipment on the roof is currently in place, you don't need to account for it. If you're installing VAV boxes, you need to account for those, but not the rest of the system.
To address your zoning specific question, you only are required to zone them separately if they're served by a stand alone HVAC system.
Paul