Are you aware of changes to commissioning for LEED v4?

 

The deadline to register projects in LEED® v2009 was Oct. 31, 2016, and new projects must use the U.S. Green Building Council’s (USGBC) LEED v4 Rating System. For the commissioning process, the updated intent of the credit is to focus on “energy, water, indoor environmental quality and durability” instead of only “energy-related systems.” This sets the stage for other changes to the commissioning credits. A simple way to look at these changes is learning how v4 has added items to the Fundamental Commissioning credit, shifted items from the Enhanced Commissioning credit to Fundamental Commissioning and added items to Enhanced Commissioning.

While more information appears on test documents, Fundamental Commissioning also includes additional systems, such as electrical distribution and plumbing pumps. Building envelope commissioning must be incorporated into the owner’s project requirements (OPR) and basis of design (BOD) documents. A current facility requirements and operation and maintenance report also is required. The largest impact to time in the field is USGBC indicating an acceptable sampling rate for functional performance testing as 10 tests or 10 percent, whichever is greater. This may increase the amount of equipment tested if the owner uses sampling. Please note that equipment checklists must be completed for all equipment.

Because the commissioning authority (CxA) must be hired prior to the end of the design development stage, which proceeds the v2009 Enhanced Commissioning hire date, it makes sense that the design review has moved into Fundamental Commissioning. In addition, the OPR and BOD review also will take place as part of Fundamental Commissioning instead of Enhanced Commissioning.

Additionally, Enhanced Commissioning has different options and paths to choose the scope. Option 1 Path 1 is the enhanced systems commissioning, similar to v2009. Option 1 Path 2 requires that monitoring-based commissioning be added to the enhanced systems commissioning; and Option 2 involves performing building envelope commissioning. If monitoring-based or building envelope commissioning is selected, all documentation (specifications, plans and reports) must include the requirements for these services. Additional documents for the new Enhanced Commissioning credit include an ongoing commissioning report and a post-construction turnover package.

As always, engage your CxA early in the process to determine the best approach for your project.

For more information, contact Wade Conlan at wconlan@hanson-inc.com.