Option 1: Whole Building Energy Simulation offers the most points, but it requires estimating the energy use of the whole building over a calendar year, using methodology established by ASHRAE 90.1-2004, Appendix G. Option 1 establishes a computer model of the building’s architectural design and all mechanical, electrical, domestic hot water, plug load, and other energy-consuming systems and devices. The model incorporates the occupancy load and a schedule representing projected usage in order to predict energy use. This compliance path does not prescribe any technology or strategy, but requires a minimum reduction in total energy cost of 14% (7% for an existing building), compared to a baseline building with the same form and design but using systems compliant with ASHRAE 90.1-2004. You can earn additional LEED points through EAc1 for cost reductions in 3.5% increments, beyond 14%.
