I manage a 25,000 s.f. facility that has 32 water source heat pumps, which are aggregately metered, but on a separate meter from the main. I am attempting to determine the thermal load of the facility based on the kWh consumed by these units for purposes of estimating the requirement of a CHP unit. Natural gas is easy, but electricity has me a little stumped. Any help, or advice for simple thermal load calcs?