Rating System

LEED BD+C: New Construction, LEED BD+C: New Construction, LEED BD+C: Core and Shell

Rating System Version

v2 - LEED 2.2, v3 - LEED 2009, v3 - LEED 2009

Inquiry

We are pursuing EA Credit 1, Option 2. We are using "Advanced Energy Design Guide for Small Office Buildings" (Achieving 30% Energy Savings over ASHRAE 90.1) in lieu of energy modeling, as allowed by LEED Reference. We are remodeling a historic building. Many "Envelope" items are existing conditions for this building. Would it be acceptable if we pursue an "overall" envelope that meets or exceeds the recommendations for envelope construction? For example, we will be able to exceed recommended R values in the roof, but we have some existing exposed brick that must remain un-furred. Or, can we exclude some existing conditions and historical conditions from our requirements for envelope R values and SHGC (for glass) values?