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We are proposing to metering a new building with a single controller. The controller has the capability to monitor each individual end use (lighting, plug loads, HVAC, water, gas, etc.). Can we meter everything on a distribution board except one specific

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NC-v4 EAc3:Advanced energy metering

Metering heat pumps with shared ATES system

All heating/cooling in our building  project is supplied by a heat pump, fed from an ATES system that is shared with other buildings on the property. We need a little clarification about what should be metered for the heating and cooling end uses in this situation: 

  • Should we meter the energy input or output of the heatpumps? So, is it the consumption of the system, or the actual heating/cooling consumed by the building? The example about the RTU in the reference guide seems to suggest we need to measure the input, but we are not very clear if that is just in case of such packaged systems ("A common example is a rooftop unit (RTU), a single packaged piece of equipment that can provide the cooling, heating, and air handling but is cost and space prohibitive to submeter. Therefore, metering the entire RTU (or metering each fuel supplying the RTU, if there is more than one) is an acceptable way to achieve this credit.")
  • If we are to meter the input to the heat pump, do we meter both the electrical input and the heat input from the ATES? or is the ATES considered stored energy and we should then meter the input to the ATES?
  • If we want to meter the input to the ATES, and it is shared with other buildings, how can we determine the portion that would be attributed to our project? 

 

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Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4454 thumbs up

Thu, 12/11/2025 - 21:27

Yes you need to sub-meter the heat pumps. How are you including this in your energy modeling? Does the ATES use any energy? If not, then it is not an energy end use that needs to be sub-metered. Is there pumping energy associated with the building's heat pump accessing the ATES? 

Tue, 12/16/2025 - 11:05

Hello Marcus, thanks for the timely feedback! 
If we meter the input to the heat pump (both electricity and ATES heat), are we then considering the ATES as a heat source, not a seasonal heat storage? I believe the "Renewable energy production" excludes it as a heat source, so I assumed it would also be the case here.And to answer your questions: 
  • The energy model is still in progress, the ATES was not yet included in it. However, the way we modeled it in previous projects was simply as a "thermal storage".
  • The ATES system may receive some energy for "regeration" - adding heat or cold to correct imbalances, which may happen in years with high cooling demand. The system would then fed via dry coolers, heat pumps, or operational adjustments to restore balance. But, balanced operations would not require energy to be fed into the ATES.
  • And there is indeed pumping energy associated with the heat pumps. There are several pumps powered by the public electric network. 

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