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Forum discussion

NC-2009 EAp2:Minimum Energy Performance

Baseline existing building envelopes

FABIO VIERO

Head of Sustainability

Manens S.p.A.

LEEDuser Premium Member

16 thumbs up

Project location :

January 14, 2016

Hi, We are currently working on an existing building under major renovation, pursing a LEED certification following NC protocol v.2009. We have a doubt in relation to the table G.3.1.5.f requirements, regarding the reference thermal transmittance values of opaque elements and fenestration used for the existing baseline-building envelope construction: Can the baseline model consider the above-mentioned performance values taken from a reference table issued by the National Energy Agency, reporting reference values and construction assemblies classified per age range and building use? Thanks.

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Marcus Sheffer

LEED Fellow

7group / Energy Opportunities

LEEDuser Expert

4454 thumbs up

Thu, 01/14/2016 - 15:35

Ciao Fabio! I don't think so but you might be able to make that case depending on the details. Hard to say for sure without knowing more about the situation. You really should determine the actual composition of the existing walls and calculate the assembly U-value accounting for the structure.

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