LEED Enhanced Commissioning requires specific additional activities beyond fundamental commissioning, documented in the LEED v4.1 BD+C reference guide.
Independent Commissioning Authority: For design-bid-build projects, the CxA must be independent from design and construction teams, not employed by the design firm or contractor, and have no financial interest in project cost. Design-build projects may use the owner’s employee CxA or an independent CxA. Independence ensures objective verification.
Design Phase Commissioning Review: Enhanced commissioning requires design review at 50-75% construction documents phase (in addition to 90% CD review required for fundamental commissioning). This earlier review allows design optimization before documents are substantially complete. The CxA provides written reports identifying performance concerns and optimization opportunities.
Commissioning Authority Review by Owner’s Representative: An independent reviewer representing the owner must evaluate the commissioning process and verify it aligns with LEED requirements. This peer review validates commissioning quality and completeness.
Building Envelope Commissioning: Enhanced commissioning requires envelope commissioning, addressing thermal, moisture, and air leakage control. This includes design review of envelope assemblies, construction observations at critical installation stages, and performance testing (blower door testing recommended). Envelope commissioning must follow NIBS Guideline 3 or equivalent.
Systems Manual: The CxA must develop a comprehensive systems manual consolidating O&M manuals, as-built drawings, system descriptions, sequences of operation, and training documentation in an organized, operator-friendly format. This goes beyond contractor-provided O&M manuals.
10-Month Post-Occupancy Review: The CxA returns approximately 10 months after substantial completion to review building operation, interview operators, analyze utility data, conduct limited functional testing, and provide recommendations for optimization. This ensures commissioned performance persists.
These additional activities provide substantially greater verification depth and longer-term engagement than fundamental commissioning.
For LEED Enhanced Commissioning services ensuring certification compliance and project success, contact Catalyst Commissioning Group at info@catalystcx.com.