Only electricity is required to be submetered in Core-and-Shell projects. Electricity for lighting, plug loads, and HVAC can be metered together, but this may not always be possible due to system constraints, unknown lighting or plug loads, or your projec

Only electricity is required to be submetered in Core-and-Shell projects. Electricity for lighting, plug loads, and HVAC can be metered together, but this may not always be possible due to system constraints, unknown lighting or plug loads, or your project scope. Consider monitoring gas as well; this will give you a better idea of your building’s total energy use.

Energy savings are determined by comparing actual metered, or measured, energy use to the projected energy use of a baseline building under similar operating conditions.Energy Savings = Projected Baseline Energy Use – Post-Construction Energy Use (actual

Energy savings are determined by comparing actual metered, or measured, energy use to the projected energy use of a baseline building under similar operating conditions.

Energy Savings = Projected Baseline Energy Use – Post-Construction Energy Use (actual metered energy use).
Post-Construction Energy Use is determined by utility metering or submetering, or by using an energy simulation model of the projected building.

Determine whether IPMVP Option B or Option D is most appropriate for your project design:Option B is based on engineering calculations using metered data and is generally more appropriate for smaller buildings.Option D uses calibrated, whole-building ener

Determine whether IPMVP Option B or Option D is most appropriate for your project design:

Option B is based on engineering calculations using metered data and is generally more appropriate for buildings with non-interactive loads only.

Option D uses calibrated, whole-building energy simulations for both the baseline and design case and is generally more appropriate for larger, more complex building projects using an energy model. 

More tips on Option B versus Option D are below, at the end of Schematic Design.