Calculating the ROI of building enclosure commissioning

According to Evan Mills, PhD, a researcher at Lawrence Berkeley National Laboratory, building enclosure commissioning, or BECx, should be viewed as “the single-most cost-effective strategy for reducing energy, costs, and greenhouse gas emissions in buildings today.”

(This article excerpted from BD+C's June 2013 AIA/CES course on cladding and exterior insulation. Take this free course at BD+C University.)

Mills studied the benefits of BECx, noting that commissioning only costs about $1.16/sf for new construction and $0.30/sf for existing buildings on average, with a payback period of as little as 14 months. Savings associated with using BECx from both maintenance and energy savings average about 16% for existing buildings and 13% for new construction. The main benefit is that whole-building energy savings are guaranteed, thanks to the pivotal role of the enclosure in determining efficiency performance.

“Further enhancing the value of commissioning, its non-energy benefits surpass those of most other energy-management practices,” including major first-cost savings through right-sizing of HVAC equipment, Mills has testified. “When accounting for these benefits, the net median commissioning project cost was reduced by 49% on average, while in many cases they exceeded the direct value of the energy savings.”

The National Institute of Building Sciences published its NIBS Guideline 3-2012 on enclosure commissioning last year. The U.S. Green Building Council has allowed the application of BECx to earn an innovation credit in the LEED rating system, and BECx was even considered as a prerequisite, but that proposal lost momentum, says Rob Kistler, AIA, NCARB, Committee Chair for NIBS Guideline 3 and Principal, The Facade Group.

It appears that LEED v4 will not explicitly encourage the detail review, onsite testing, and observation that some enclosure experts say is what makes BECx effective, notes Tristan Roberts, with BuildingGreen’s LEEDUser service. Instead, the new LEED draft language directly quotes NIBS Guideline 3, which describes the following techniques as part of proper BECx for enhanced building commissioning:

• Devise a plan early in the project cycle that describes testing requirements, acceptance criteria, and documentation.

• Review details in the construction documentation to check for overall performance, continuity of weather barriers and insulation, and constructability.

• Conduct observations on the job site as required for critical milestones in enclosure installation, from field mockups to trades startup to field testing.

• Use mockups to benchmark workmanship requirements and ensure compliance with specifications and manufacturer’s installation requirements.

The NIBS committee for BECx, which Altenhofen serves on, recommends including a consulting enclosure expert for the building project, especially in the construction administration phase. The expert will help ensure proposed cladding materials and systems are integrated properly into the design process, followed by visual observations of a statistical sampling of installation of work. Toward the end of the CA phase and before acceptance, a blower-door test will check whether the air infiltration levels are equal to or better than standard.

As noted in the summary of NIBS Guideline 3, BECx helps reduce the chances that inadequate cladding work will be discovered during the punch list phase: “The performance of the enclosure cannot be verified until the entire building is completely enclosed. At this time it is not possible to tune or dial in the performance. To access a nonperforming subsystem or assembly might be very expensive.”

(This article excerpted from BD+C's June 2013 AIA/CES course on cladding and exterior insulation. Take this free course at BD+C University.)

Page Southerland Page, Gensler, Stantec, HOK, and Skidmore, Owings & Merrill top BD+C's ranking of the nation's largest government building sector architecture and architecture engineering (AE) firms for 2023, as reported in the 2023 Giants 400 Report. Note: This ranking includes revenue from all government building sectors, including federal, state, local, military, and Veterans Affairs (VA) buildings.

Nashville Fairgrounds Speedway Renovation rendering, black building with blue accents and large windows

Designers | Nov 6, 2023

DLR Group opens office in Nashville, Tenn.

DLR Group is expanding its presence in the Southeast with the opening of an office in downtown Nashville, Tenn.—a collaborative effort led by DLR Group Principals Matthew Gulsvig, AIA, LEED AP, and Randall Coy.

UChicago Medicine first freestanding cancer center TOWER FINAL Rendering courtesy CannonDesign

Healthcare Facilities | Nov 3, 2023

The University of Chicago Medicine is building its city’s first freestanding cancer center with inpatient and outpatient services

The University of Chicago Medicine (UChicago Medicine) is building Chicago’s first freestanding cancer center with inpatient and outpatient services. Aiming to bridge longstanding health disparities on Chicago’s South Side, the $815 million project will consolidate care and about 200 team members currently spread across at least five buildings. The new facility, which broke ground in September, is expected to open to patients in spring 2027.

Office Buildings | Nov 2, 2023

Amazon’s second headquarters completes its first buildings: a pair of 22-story towers

Amazon has completed construction of the first two buildings of its second headquarters, located in Arlington, Va. The all-electric structures, featuring low carbon concrete and mass timber, help further the company’s commitment to achieving net zero carbon emissions by 2040 and 100% renewable energy consumption by 2030. Designed by ZGF Architects, the two 22-story buildings are on track to become the largest LEED v4 Platinum buildings in the U.S.

Sustainability | Nov 1, 2023

Researchers create building air leakage detection system using a camera in real time

Researchers at the U.S. Department of Energy’s Oak Ridge National Laboratory have developed a system that uses a camera to detect air leakage from buildings in real time.

Adaptive Reuse | Nov 1, 2023

Biden Administration reveals plan to spur more office-to-residential conversions

The Biden Administration recently announced plans to encourage more office buildings to be converted to residential use. The plan includes using federal money to lend to developers for conversion projects and selling government property that is suitable for conversions.

Sustainability | Nov 1, 2023

Tool identifies financial incentives for decarbonizing heavy industry, transportation projects

Rocky Mountain Institute (RMI) has released a tool to identify financial incentives to help developers, industrial companies, and investors find financial incentives for heavy industry and transport projects.

Contractors | Nov 1, 2023

Nonresidential construction spending increases for the 16th straight month, in September 2023

National nonresidential construction spending increased 0.3% in September, according to an Associated Builders and Contractors analysis of data published today by the U.S. Census Bureau. On a seasonally adjusted annualized basis, nonresidential spending totaled $1.1 trillion.

For the Multifamily Sector, Product Innovations Boost Design and Construction Success

This course covers emerging trends in exterior design and products/systems selection in the low- and mid-rise market-rate and luxury multifamily rental market. Topics include facade design, cladding material trends, fenestration trends/innovations, indoor/outdoor connection, and rooftop spaces.

This photo of Taylor Design’s LA office shows standard branding, decorative lighting, and a family table (the 70%), with community art (the 30%) unique to the location.

Office Buildings | Oct 30, 2023

Find Your 30: Creating a unique sense of place in the workplace while emphasizing brand identity

Finding Your 30 gives each office a sense of autonomy, and it allows for bigger and broader concepts that emphasize distinctive cultural, historic or other similar attributes.

Currently Reading

Calculating the ROI of building enclosure commissioning

Tags

Giants 400 | Nov 6, 2023

Designers | Nov 6, 2023

Healthcare Facilities | Nov 3, 2023

Office Buildings | Nov 2, 2023

Sustainability | Nov 1, 2023

Adaptive Reuse | Nov 1, 2023

Sustainability | Nov 1, 2023

Contractors | Nov 1, 2023

Sponsored | MFPRO+ Course | Oct 30, 2023

Office Buildings | Oct 30, 2023

Most Popular Content

Magazine Subscription

Get our Newsletters

Follow BD+C: