We are working on a medical center in Mexico to be certified LEED EBOM and it is currently under construction. We would like to advice the contractor on which systems need to be installed before completion so when the building is under performance period no major renovations are required. Can anyone confirm the level of submetering required for all energy uses? The current scheme that is being built has BMS for HVAC and all electrical systems, plus the utility meters for all electricity and gas consumption. Can anyone confirm if to comply with EAp2 and EAc1 if further submetering is required, for example lighting, equipment, pumps, hot water , etc will need to be separetaly submetered to comply with the criteria?

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Eric Johnson

Sustainable Cost Solutions LLC

LEEDuser Premium Member

195 thumbs up

Tue, 11/26/2013 - 18:42

"System-level metering is in place for at least 40% of the total expected annual energy consumption of the building, and that at least one of the two largest energy-use categories or building systems are metered to an extent representing at least 80% of total annual energy consumption for that category or system. metering and recording systems must be permanent and operate continuously. In order to qualify as continuous, meter readings must be taken automatically at least every 15 minutes."

Ana Paula Quiros

Architect, LEED AP BD+C

Livet Consulting

LEEDuser Basic Member

0 thumbs up

Tue, 11/26/2013 - 19:16

Eric thank you very much for your answer, it looks like sub-meters would need to be in place to monitor 80% of total annual energy consumption in addition to the HVAC one, therefore if you agree we would recommend submetering for lighting, fans, pumps and domestic hot water, it is interesting that in the Energy Portafolio Manager only monthly total energy consumption seemed to be required. Utility meters would only provide readings every time they are recorded, not automatically, could you please also confirm the source of your information? Thanks,

Eric Johnson

Sustainable Cost Solutions LLC

LEEDuser Premium Member

195 thumbs up

Tue, 11/26/2013 - 19:24

Ana, Hi, I can't recommend any path to go forward without reviewing the project in more detail, but it sounds like you're on the right path. The information I posted is from the EBOM reference guide and a successful EBOM project review.

Michael Smithing

Director - Green Building Advisory

Colliers International Ltd.

LEEDuser Basic Member

201 thumbs up

Wed, 11/27/2013 - 07:08

Ana - The strict answer to your question is that measurement of the electricity, gas and other primary energy utilities to the site (district heating, generator fuel, etc.) is sufficient for EAp2 and EAc1. Eric is giving great advice that will result in a better building that is easier to certify and now is certainly the best time to add additional submeters. His language is from EAc3.2. Following his advice will also make it much easier to create the energy use breakdown required for EAp1.

Eric Johnson

Sustainable Cost Solutions LLC

LEEDuser Premium Member

195 thumbs up

Wed, 11/27/2013 - 07:32

Michael, Everyone should have to do a little of their own work to get to the answer. I assumed the important part of the question was about extra cost for EBOM points later.

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