Rating System

LEED BD+C: New Construction, LEED BD+C: New Construction, LEED BD+C: Schools, LEED BD+C: Schools, LEED BD+C: Core and Shell

Rating System Version

v2 - LEED 2.2, v3 - LEED 2009, v2 - Schools 2007, v3 - LEED 2009, v3 - LEED 2009

Inquiry

Project is pursuing EA Credit 1 points under OPTION 3 - PRESCRIPTIVE COMPLIANCE PATH: Advanced Buildings Core Performance Guide. The proposed building is a 50,000 sq. ft. office building located in climate zone 3a. According to ASHRAE Standard 90.1 2004 an air-side or water-side economizer is not required, although the project will utilize water-side economizers. Section 2.13 of the Core Performance Guide details performance and operational requirements of air-side economizers but does not mandate the usage thereof. We have three related questions: 1) Must a project have air-side economizers to comply with Section 2.13 of the Core Performance Guide? 2) If an economizer is required, can a water-side economizer be utilized in lieu of the air side economizer. 3) The EAc1 Template does not make provision to document Option 3. What documentation and template format is required in order to document the points claimed under Option 3?