I have a questions about the modeling of Parking Garages for ASHRAE 90.1 Appendix G energy model

As I was looking up the definition of a conditioned and semi-heated space in Section 3 of ASHRAE 90.1 I noticed that under the definition of an "unconditioned space" it states that "Crawlspaces, attics, and parking garages with natural or mechanical ventilation are not considered enclosed spaces." In addition the definition of "ventilation" is "the process of supplying or removing air by natural or mechanical means to or from any space. Such air is not required to have been conditioned." Since the air is not required to be conditioned then the air can or cannot be conditioned, does that mean that any parking garage conditioned or unconditioned is not considered an enclosed space? If that is true then how do you model a parking garage since all spaces are defined as being enclosed?

Richard Auffermann