I read the IPMVP Vol 1 on option C, as our project is 75% more than the total building area.
i not too sure what i read is correctly, therefore need more clarification.
base on this option, we need to install submetering at major energy consumption load (lighting, hvac system, irrigation, etc). once we installed these metering, do we need to have a BAS to monitor it?
as i read along the IPMVP book,. at clause (4.9.5 Option C: Metering), it mention that ,we could track our usage base on utilities bill as we need to do the actual payment every months. this method could allow us to track our usage as compare with the baseline as well.

am i correct?