Perform a calibrated building energy simulation model that reflects actual occupancy and weather, after the first year’s energy usage data becomes available. The energy modeler performs the calibrated simulation with the assistance of the M&V provider. 

Set up the BMS to provide monthly reports as required by the M&V plan, if applicable. 

Option D: Calibrated Simulation

The ECM usage can be tracked with a simple spreadsheet and does not require complicated calculations or modeling.

The facilities manager or M&V provider compares the baseline energy use of the ECMs to the post-construction energy use.

Option B: Energy Conservation Measure Isolation

M&V systems require continuous energy use and staff attention. One of the larger costs associated with this credit is the time needed by staff to read, interpret, and act on feedback provided by the M&V system. Although more expensive to install, a complex building or a building with multi-tenant spaces can benefit financially from an integrated computerized BMS that assists in day-to-day management. 

The payback period for M&V programs depends on the initial cost of additional meters and whether the program identifies inefficiencies that wouldn’t have been found otherwise. Some fixes may be substantial and will pay for the metering system. After the BMS or metering system has been installed, the true return depends on the commitment of the owner and operational staff.

A 5%–10% discrepancy between the baseline energy use and the post-construction energy use may account for operational changes in a good energy model. However, a 25% discrepancy would not be out of the ordinary. 

Record any post-construction upgrades or changes to operations and maintenance in order to best understand post-construction energy use.