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We have installed submeters on our building but the utility bill includes energy use from several other buildings located on the same campus. How do we reconcile this during the LEED review process?

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What do I do if the number of building occupants, operating hours, or vacant space changes during the performance period?

If you pursue the streamlined path for an Energy Star label, should the performance period for EAc6 match the 12-month time frame of the label?

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Our building includes a large laboratory space. Can our project benchmark under the Labs21 program?

We have an international project and the space type is eligible for an Energy Star rating. Can we pursue Case 1 to demonstrate compliance given the recently released alternative compliance paths for international projects?

We have a number of buildings on a single campus that we would like to certify at the same time. Is it possible to benchmark the buildings at the campus level?

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Our building includes heavy process loads that significantly increase the overall energy use in the building. If we submeter these loads, can we exclude this energy use for benchmarking purposes?

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Forum discussion

EBOM-2009 EAp2:Minimum Energy Efficiency Performance

Central Chiller Plant - Chilled Water Btu Metering

Simon Sue

SL+A INTERNATIONAL ASIA INC.

LEEDuser Premium Member

305 thumbs up

June 14, 2011

A central chiller plant supplies chilled water to our project building and several other buildings. In order to generate the Energy Star report, we are required to input the chilled water energy consumption in Btu. With reference to the following equation, instead of having the Btu meter directly, would having both a temperature sensor and a flow meter installed on the chilled water suffice? 500 x Flow Rate [gal/min] x Delta T [F] = [Btu/h]

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Michael Opitz

Director of Sustainability

Iconergy

LEEDuser Basic Member

40 thumbs up

Thu, 06/23/2011 - 23:29

Jason: In principle that would be fine - LEED does not care how your metering is set up, just that you're measuring (and recording) the energy flowing into your building. My one suggestion is to ensure that the quality of the metering and data logging is good enough. If you're measuring supply & return temperatures and water flows separately, just make sure you're doing it properly and robustly so you'll get accuracy and precision similar to what a dedicated, unified BTU meter would provide. Mike

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