Submetering is the measurement and allocation of the individual tenant, apartment, department, or process in a master-metered building, facility, or campus. Submetering is typically focused on electricity, because of the relative ease of submetering electricity consumption.

to measure is to control

Auditing energy use Verify accuracy of utility bills Allocate energy costs to specific departments or processes Assign accountability Identify equipment and process problems Determine equipment and system efficiency Audit "before and after" energy usage for projects Discover opportunities for potential energy efficiency improvements