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NC-2009 EAc5:Measurement and Verification

Defining the baseline

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Gustav Alfaro
Mechanical Engineer
LEEDuser Basic Member
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Hi to all: Please help me to clarify how the baseline model is defined for the M&V plan, it is clear that for the "actual case" the proposed model created for the EAc1 must be calibrated based on energy bills and measured performance during one year; but how is defined the baseline mode for comparision purposes? Should it be the proposed model delivered for EAc1? Should it be the baseline model delivered for EAc1? Should it be the proposed model delivered for EAc1 substracting the ECM implemented during the design and construction? Thank you a lot for your comments

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Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
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Thu, 05/02/2013 - 17:21

You basically take the calibrated model of the building and use that to create another Appendix G baseline model. This is your calibrated baseline for comparison. So the adjusted schedules, utility rates, occupancy, etc. that must be identical are taken from the calibrated model and applied to the Appendix G baseline model.
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Gustav Alfaro
Mechanical Engineer
LEEDuser Basic Member
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Thu, 05/02/2013 - 19:39

Thank you for your soon feedback. What you indicate is what I understood but the Reference Guide says "Calibration is achieved by adjusting the energy simulation model to reflect actual operating conditions and parameters. Next, the conservations measures are removed from the model to define the baseline..." so, this sentence is kind of confusing because it seems that, for instance, if one of the conservation measures was to insulate the walls, then in the EAc5 baseline models the walls should appear without insulation (removing the conservation measures). Id appreciate if you can clarify further.
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Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4454 thumbs up

Thu, 05/02/2013 - 20:46

They mean that you should take the level of wall insulation from what you have in your building back down to the code minimum insulation value. An Appendix G baseline does just that.
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Gustav Alfaro
Mechanical Engineer
LEEDuser Basic Member
10 thumbs up

Thu, 05/02/2013 - 23:46

Thank you Marcus

Fri, 07/05/2013 - 16:56

I mistakenly assumed that the baseline energy model for this credit would be the as-built simulation used to document compliance with EAp2 and EAc1 rather than the appendix G model. It made sense to me to compare actual energy use to projected energy use but I suppose in the end you end up with the same information. Thank you.

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