Meeting the Minimum Energy Performance Prerequisite in LEED v4 is achieved by demonstrating energy cost savings versus ASHRAE 90.1-2010, but projects in California can opt to use Title 24-2013 in lieu of ASHRAE. While this used to be a convenient exception to exploit because it allowed the energy model created for the building permit to be reused for the LEED
submittal, this is no longer the case because:
- Previously using Title 24 to determine your LEED baseline meant using an older energy code (Title 24-2005 instead of ASHRAE 90.1-2007) which tends to mean a less stringent energy code—but in LEED v4 the older energy code is now ASHRAE.
- The energy model created to get a building permitted in California must now use a less flexible simulation engine (CBECC-Com) that handicaps the ability of the energy model to accurately reflect the anticipated building design and operations.
- Software (e.g. EnergyPro) that can accurately simulate the Title 24-2013 proposed and baseline energy models in accordance with LEED v4 requirements and automatically generate sufficient input and output reports for a LEED v4 submittal simply does not exist.
The increased demands of a LEED v4 energy performance submittal affects all projects—not just those in California. And it’s not just the documentation that has become more comprehensive, but the process the design team is expected to utilize as well. The Minimum Energy Performance Prerequisite now requires a narrative describing how energy modeling was used to make design decisions throughout the project delivery process and an additional point can be earned under the Integrative Process Credit for performing pre-schematic energy and water analyses.
Whether your project is in California or not, LEED v4 requires a greater breadth and depth of knowledge than ever before. Who better to tackle the challenge than specialists like us?