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.)

Adults who live in walkable neighborhoods are more likely to interact with their neighbors and have a stronger sense of community than people who live in car-dependent communities, according to a report by the Herbert Wertheim School of Public Health and Human Longevity Science at University of California San Diego.

Sustainability | Jul 13, 2023

Deep green retrofits: Updating old buildings to new sustainability standards

HOK’s David Weatherhead and Atenor’s Eoin Conroy discuss the challenges and opportunities of refurbishing old buildings to meet modern-day sustainability standards.

Contractors | Jul 13, 2023

Construction input prices remain unchanged in June, inflation slowing

Construction input prices remained unchanged in June compared to the previous month, according to an Associated Builders and Contractors analysis of U.S. Bureau of Labor Statistics Producer Price Index data released today. Nonresidential construction input prices were also unchanged for the month.

U.S. Embassy in Ankara, Turkey, designed by Ennead Architects Photo: Scott Frances

Government Buildings | Jul 13, 2023

The recently opened U.S. Embassy in Ankara reflects U.S. values while honoring Turkish architecture

The U.S. Department of State’s Bureau of Overseas Buildings Operations (OBO) has recently opened the U.S. Embassy in Ankara, Turkey. The design by Ennead Architects aims to balance transparency and openness with security, according to a press statement. The design also seeks both to honor Turkey’s architectural traditions and to meet OBO’s goals of sustainability, resiliency, and stewardship.

Affordable Housing | Jul 12, 2023

Navigating homelessness with modular building solutions

San Francisco-based architect Chuck Bloszies, FAIA, SE, LEED AP, discusses his firm's designs for Navigation Centers, temporary housing for the homeless in northern California.

Fire safety considerations for cantilevered buildings, One Central Park, Lilker

Fire safety considerations for cantilevered buildings [AIA course]

Bold cantilevered designs are prevalent today, as developers and architects strive to maximize space, views, and natural light in buildings. Cantilevered structures, however, present a host of challenges for building teams, according to José R. Rivera, PE, Associate Principal and Director of Plumbing and Fire Protection with Lilker.

Building Owners | Jul 12, 2023

Building movement: When is it a problem?

As buildings age, their structural conditions can deteriorate, causing damage and safety concerns. In order to mitigate this, it’s important to engage in the regular inspection and condition assessment of buildings for diagnosis.

Photo: Roy Blunt 80 M Street SE (80 M), a mass timber additio

Mass Timber | Jul 11, 2023

5 solutions to acoustic issues in mass timber buildings

For all its advantages, mass timber also has a less-heralded quality: its acoustic challenges. Exposed wood ceilings and floors have led to issues with excessive noise. Mass timber experts offer practical solutions to the top five acoustic issues in mass timber buildings.

Multifamily Housing | Jul 11, 2023

Converting downtown office into multifamily residential: Let’s stop and think about this

Is the office-to-residential conversion really what’s best for our downtowns from a cultural, urban, economic perspective? Or is this silver bullet really a poison pill?

Currently Reading

Calculating the ROI of building enclosure commissioning

Tags

Codes and Standards | Jul 17, 2023

Multifamily Housing | Jul 13, 2023

Sustainability | Jul 13, 2023

Contractors | Jul 13, 2023

Government Buildings | Jul 13, 2023

Affordable Housing | Jul 12, 2023

Sponsored | Fire and Life Safety | Jul 12, 2023

Building Owners | Jul 12, 2023

Mass Timber | Jul 11, 2023

Multifamily Housing | Jul 11, 2023

Most Popular Content

Magazine Subscription

Get our Newsletters

Follow BD+C: