Dear All,

 
One of our clients is developing a project that includes two independent buildings (9 levels office tower and a small retail building) sharing a common enclosed carpark. This carpark is the only connection between both buildings.

The client intends to certify the office tower (LEED BD+C Core&Shell) but does not intend to certify the retail building.

Our proposal for the LEED Boundary includes:

  1. the office tower (obviously);
  2. a portion of the outdoor site areas (paving and landscaped), located around the office tower (but not including site areas around the retail building);
  3. a portion of the enclosed carpark, defined taking into account the number of parking places allocate to each building (please note that there is no physical separation inside the enclosed carpark).

Outdoor lighting and enclosed carparks are fed by the office tower main power branch. The question is: is it necessary to install meters to breakdown energy use of outdoor lighting and enclosed carparks between zones included in the LEED Boundary and those not include in the LEED Boundary ? Please note that this breakdown would imply:

  1. an inefficient design of the power supply scheme (with much more cable length than the standard way);

OR

  1. the installation of a large number of energy meters, each one metering very small loads.

Please note that for water metering, there is a LEED Interpretation (ID# 10475 v4 BDC campus: WEp Building level water metering) that states: “For compliance with LEED v4 WE prerequisite Building Level Water Metering, projects whose water use for irrigation is metered at the campus system level may submit an engineering calculation that accurately reflects the water consumption of the landscaped area within the project boundary, or prorate irrigation data for the project boundary from the campus meter. If the project chooses to prorate irrigation data from the campus meter in lieu of installing irrigation meter(s) to track landscape water consumption within the project boundary for WE prerequisite Building Level Water Metering, irrigation water systems are excluded from the list of water subsystems eligible for WE credit Water Metering.”

Is there any similar interpretation for energy metering ? Can you pleased provide us with guidance on this subject ?

Thanks in advance.