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CI-v4 EAp2:Minimum energy performance

Default envelope properties

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Ricardo Sá
Director of Sustainability
Edifícios Saudáveis Consultores (503 910 767)
LEEDuser Basic Member
79 thumbs up

Hi,

we’re working in a project of an existing office building (10 floors) pursuing LEED CI certification. We are following option 1 under EAp2 and our doubt is related with envelope issues.

Since we’re talking about an existing building, built 30 years ago and with missing documentation, if existing envelope thermal characteristics are not known, can we use any default values of thermal characteristics to model proposed building energy performance (e.g. for glazing properties ASHRAE 90.1-2010 Table A8.2)?

Regards,

 

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

Tue, 05/08/2018 - 13:06

No defaults that I know of. Even though you don't have drawings you should still be able to estimate the envelop properties based on the construction and the thickness of the assembly components. Quite often you can do a little probing to see if there is any insulation in the walls.

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