Rating System

LEED BD+C: New Construction, LEED BD+C: New Construction, LEED BD+C: New Construction

Rating System Version

v2 - LEED 2.0, v2 - LEED 2.2, v2 - LEED 2.2

Inquiry

Our project is registered under LEED version 2.1 and is located in California. Its energy simulation for code compliance demonstrates energy savings relative to Title 24 2005. LEED 2.1 Energy and Atmosphere Credit 1 Table 8c Point Interpolation Table converts Title 24 2001 savings to EAc1 points, but there is no equivalent table for Title 24 2005. Several studies have shown that Title 24 2005 is significantly more stringent than Title 24 2001 (See, for example, 2005 Title 24 Savings by Design Impact Study, Energy Soft LLC, which shows that project savings calculated relative to Title 24 2005 are 10-20% less than when calculated relative to Title 24 2001. This study is available at http://www.californiaenergyefficiency.com/efficiency/SCGWorkpapers/NonPartnershipPrograms/SavingsByDesign/SavingsByDesignWorkpapers.doc.). Using the cited study above, can we assume that the Title 24 2005 version is 10% more stringent than Title 24 2001, add 10% to our project\'s savings calculated relative to Title 24 2005 and assign EAc1 points based on Table 8c? As a fall back, acknowledging that Title 24 2005 is at least as stringent as Title 24 2001, may we use Interpolation Table 8c with our simulated savings (as is) relative to Title 24 2005 so that we may avoid re-modeling the project for Title 24-2001?