855773644-LEED-v5-BD-C-Reference-Guide-Launch-Edition - Page 373

Extracted Content

• Air leakage testing . Provide field testing of air leakage using one of the referenced ASTM or ANSI standards. ASTM E783 evaluates air leakage through windows and doors. ASTM E779 uses the fan-pressurization method for testing. ASTM E1186 provides an array of methods for evaluating air leakage. ASTM E3158 provides a standard method for testing large or multizone buildings. ASTM E1827 determines air tightness using an orifice blower door. Residential spaces in mixed use buildings may also apply ANSI/RESNET/ICC 380 .

  • Water penetration testing . For projects with scope of work including fenestration or exterior doors, apply ASTM 1105 or AAMA 501.2 to provide water penetration of installed exterior windows, skylights, doors, and curtain walls. Otherwise, water penetration testing is not required.

  • Infrared imaging . ASTM C160 is appropriate for envelope scope of work that includes framed members. For scope that includes a roof with insulation above deck, ASTM C1153 can be used to locate wet insulation. Otherwise, infrared imaging is not required.

EAp3: Fundamental Commissioning, Table 2 compares the ASHRAE 90.1 Commissioning Requirements for the prerequisite and the ASTM E2947-21a requirements for Enhanced Commissioning of the Building Enclosure. The table also provides the timing for each task.

Option 2. Monitoring-Based Commissioning (MBCx)

Monitoring-based commissioning enables building operators to identify operational issues as they occur, facilitating achievement of the project’s performance goals on an ongoing basis. Both Paths 1 and 2 require an Energy Information System (EIS) that enables visualization, analytics, and automated reporting of the metered data referenced in EAp4: Energy Metering and Reporting ; and a minimum three-year commitment to implement monitoring-based commissioning (MBCx) informed by the EIS. Path 2 requires enhanced monitoring and software functionality.

SELECTING AN MBCX PROVIDER

Contract with a third-party MBCx Provider (MBCxP) for a minimum three-year timeframe or designate a qualified MBCxP on the building operations team. The MBCxP must have direct experience on similar projects. Many MBCxP’s have a programming or controls integration background and extensive experience with Energy Information System (EIS) and Fault Detection and Diagnostics (FDD) technologies.

The MBCxP can be the same as the CxP or can be a different entity. If the CxP and the MBCxP are different entities, a communication plan must be established so both entities can coordinate during the construction phase and the warranty period.

U.S. Green Building Council LEED v5 Reference Guide for Building Design and Construction, April 2025 Launch Edition 363