We are pursueing 5.1 Opt. 1 and 5.2 at a CS-project with 10 floors leasable to different tenants. The electricity metering is not clear for me:
The RG says on page 317 that the monitoring network in the base building has to be capable of bein expanded to accomodate the future tenant submetering.
For me this sounds as if we have to provide an interface/possibility (cables) to connect the future tenant meters to the BMS for data storage. Is that right or is it also possible to store the data locally on the meterin device?
On the other hand the EAc5.2 just says that tenant should have the possibility to measure their consumption as required by LEED CI.
We have to use the data from the tenant meters for the calibrated simulation. In case that the meter is not on the BMS the tenant has to commit to provide the stored data after the 1-year period, right?
Thanks in advance!
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5909 thumbs up
August 24, 2012 - 8:58 am
One of the most common mistakes associated with these credits is to assume that the plan for one is the same as the plan for the other. The tenant submetering is done by fuel type while the M&V submetering needs to be by energy end use to calibrate the model. Tenant submetering is often not particularly useful when calibrating the model since it does not contain enough of a breakdown by end use, especially for electricity.
Regarding your specific questions - the credit language specifically states that the data needs to be centrally monitored. This means to me that remote submeters that are read manually by the tenant or owner would not qualify but that any type of meter that has the ability to provide that data to a central location (could be internet based, wireless or hard wired) would qualify. A BMS based system would work. Utility meters for each tenant work too.
LEED CI EAc3 Case 1 spells out the submetering requirements within the tenanat space regarding what must be metered and how. The CS EAc5.1 simply indicates that this must be tied together at a central location.
If your M&V Plan for 5.1 includes the data gathered on the tenant submeters then yes you will need a way to make sure you can get it. This data could be of limited value in your calibration as noted above.