Option 2: Prescriptive Compliance Path: ASHRAE Advanced Energy Design Guide for Small Office Buildings 2004 refers to design guides published by ASHRAE for office projects of 20,000 ft2 of less. These guides outline strategies to reduce energy use by 30% from ASHRAE 90.1-2001 levels, or an amount equivalent to a 10%–14% reduction from the ASHRAE 90.1-2004 standard. If you choose this compliance path, become familiar with the list of prescriptive requirements and commit to meeting them. (See the AEDG checklist in the Documentation Toolkit.)