EAc3 - Clarification on the Advanced Energy Metering.

Thanks Marcus... your feedback is most appreciated. Let me send this off to our team Electrical Engineer asap.

Hello Marcus,

This seems a quite unclear venture as answered questions as received was returned with some more itemized ones; our in-house MEP Team still needs clarification on the proposed plan to achieve the EAc3-Advanced Energy Metering Credit. Below is the plan for items to submeter as well as clarifying questions; these are definitely items requiring experience with this credit and the dynamics of the metering systems and components:

• Two major End Uses of equipment are planned to be metered for the Advanced Energy Metering Credit. These categories are more than 10 % of the total building energy load:
  1. Packaged Air Handlers
  2. Space Heating – (VAVs, Unit Heaters)
• There is equipment that is inside the building that is supplied from a panel in another building.
  1. This equipment is –  (4) welding receptacles, and (4) maintenance shop tools.
  2. Does this equipment count towards the total building load for electrical energy consumption of the building?
  3. IF these loads do count, they will be categorized into their own end use category of maintenance shop tools. They will NOT be lumped into a generic receptacle category.
• Receptacle End Uses / Categories:
  1. Any receptacles for equipment serving critical control systems – (power plant control room computers, server racks, etc.) – will be categorized in a separate end use from typical 120 V/1 receptacles in the rest of the building.
  2. There is a generic category of receptacles – (such as typical office receptacles, hallways, kitchen equipment).
  3. Again IF the maintenance equipment listed above must count toward the total building energy consumption, it will be its own individual end use / category of maintenance shop tools.
  4. Only Receptacle Category / End Use C (directly above) for receptacles would represent a load over 10 % of the building total load. So IF that must be counted, that is the only receptacle category that would be metered.
• In general:
  1. This will be achieved by installing multi circuit meters that will monitor the sum total of each group by subtraction. See attached electrical panel schedule. In yellow is space heating and in red is packaged air handlers.
  2. The data will be fed to and recorded by the Building Automation System. The meters are compatible with BACnet.
  3. The whole building energy use metering and prerequisite for building level metering will be accomplished by submeters for all electrical panels in this building.
  4. There is a panel inside this building that supplies another building (that is non LEED). Would that count towards in the total load?

For clarity; this is a pre-engineered metal building, a mixed use facility that consist of the Administrative, mini-warehouse and IT/ security unit of the facility.

Please confirm the above plan is acceptable as per above questions; due to the context and volume of questions, for clarity please place answers in same order to applicable questions. Thank you