We have a G + 7 floor building in which the client is occupying only 5th, 6th and 7th floor. Dedicated VRF systems are provided for these floors. In such a scenario, we can model only the last 3 project floors. Do we have to model the lower floors as dummy floor? If yes, should it be modeled as conditioned or unconditioned space? The entire G + 7 will be office floors.