Custom-built support for LEEDuser members
LEEDuser tip sheets, written by our team of LEED experts, fill gaps in knowledge we’ve observed between the LEED Reference Guide, LEED Online, and LEED Interpretations. We update them regularly so that our members get the most relevant guidance for current issues on their projects.
Building energy modeling has become more common over the last decade or so, and it’s a standard practice for projects pursuing LEED certification. But there’s a problem: the later the team waits to start modeling the building, the more potential energy-saving opportunities have been missed along the way. The intent of energy modeling is to use these analysis tools to guide design decision-making.
That’s where design-phase energy modeling comes in; it’s a way to do energy modeling that can actually inform the design of the building and its systems. There’s even a standard defining best practices for design-phase energy modeling: ASHRAE 209, Energy-Simulation-Aided Design for Buildings Except Low-Rise Residential Buildings.
What ASHRAE 209 requires
The standard explains how to best use energy modeling during 11 “modeling cycles,” listed here by design phase: