Option D: Calibrated Simulation

Projected baseline energy use can be determined using energy efficiency standards or guidelines.

If applicable, program the BMS to provide monthly reports as required by your M&V plan. 

If energy use discrepancies exist between projected use and actual use, your project team needs to identify the cause and follow your M&V plan for corrective action. Examples of common discrepancies are:

inaccuracies in the building simulation model; 
different building use or occupancy than anticipated; 
improperly functioning equipment; 
and switches and controls not calibrated as intended.  

Determine the actual energy savings of the whole building or your space, or all building systems, after occupancy. You’ll need to adjust both baseline and actual energy performance based on changes in weather, occupancy, and other variables that affect energy performance. The facilities manager and M&V provider should determine these variables and adjust baseline and actual energy performance accordingly. 

Case 2: Projects with 75% or more of total building area

Measurement and submetering have always proven to be useful for smooth operations and can be used to maximize energy savings and optimize the functioning of all controls.

Recording any upgrades, or operational and maintenance changes, will help you understand post-installation energy use. 

Encourage the operations team to focus not just on keeping the building running, but on running it at optimal efficiency.

Meters and submeters should be recalibrated per manufacturers’ recommendations.