Our project is a garment factory building with no conditioned area, having majority floor area as production unit which is mechanically ventilated. The office & meeting areas in the whole building is less than 5% of the total floor area, which is also unconditioned (No heating or cooling equipment) and only mechanically ventilated. My query is can I simulate the whole building without any conditioned area, modeling ventilation fans & process load identically in both base case and proposed case and claiming energy savings only in the lighting system.