flexiblefullpage -

HORIZONTV FEATURING BD+C: WATCH EPISODES ON DEMAND AT HORIZONTV

Menu View Full Menu
Subscribe Here
billboard - default
interstitial1 - interstitial
catfish1 - bottom
Currently Reading

Calculating the ROI of building enclosure commissioning

Calculating the ROI of building enclosure commissioning

A researcher at Lawrence Berkeley National Laboratory calls building enclosure commissioning “the single-most cost-effective strategy for reducing energy, costs, and greenhouse gas emissions in buildings today.”

By C.C. Sullivan | June 28, 2013
Continue Reading
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.)

Tags

Related Stories

Photo by Craig Lovelidge on Unsplash - Retail design trends: Consumers are looking for wellness in where they shop
Retail Centers | Apr 4, 2024

Retail design trends: Consumers are looking for wellness in where they shop

Consumers are making lifestyle choices with wellness in mind, which ignites in them a feeling of purpose and a sense of motivation. That’s the conclusion that the architecture and design firm MG2 draws from a survey of 1,182 U.S. adult consumers the firm conducted last December about retail design and what consumers want in healthier shopping experiences.

Foster + Partners, CannonDesign unveil design for Mayo Clinic campus expansion in Rochester, Minn.
Healthcare Facilities | Apr 3, 2024

Foster + Partners, CannonDesign unveil design for Mayo Clinic campus expansion

A redesign of the Mayo Clinic’s downtown campus in Rochester, Minn., centers around two new clinical high-rise buildings. The two nine-story structures will reach a height of 221 feet, with the potential to expand to 420 feet.

Bakke Recreation & Wellbeing Center
Sports and Recreational Facilities | Apr 2, 2024

How university rec centers are evolving to support wellbeing

In a LinkedIn Live, Recreation & Wellbeing’s Sadat Khan and Abby Diehl joined HOK architect Emily Ostertag to discuss the growing trend to design and program rec centers to support mental wellbeing and holistic health.

Helm on the Allegheny, Pittsburgh co-living apartment complex
Architects | Apr 2, 2024

AE Works announces strategic acquisition of WTW Architects

AE Works, an award-winning building design and consulting firm is excited to announce that WTW Architects, a national leader in higher education design, has joined the firm.

Photo by Seth Powers, courtesy SOM
Office Buildings | Apr 2, 2024

SOM designs pleated façade for Star River Headquarters for optimal daylighting and views

In Guangzhou, China, Skidmore, Owings & Merrill (SOM) has designed the recently completed Star River Headquarters to minimize embodied carbon, reduce energy consumption, and create a healthy work environment. The 48-story tower is located in the business district on Guangzhou’s Pazhou Island.

Westview High School in Omaha, Neb., includes a YMCA to share facilities and connect with the broader community Photo: James Steinkamp Photography, courtesy Perkins&Will
K-12 Schools | Apr 1, 2024

High school includes YMCA to share facilities and connect with the broader community

In Omaha, Neb., a public high school and a YMCA come together in one facility, connecting the school with the broader community. The 285,000-sf Westview High School, programmed and designed by the team of Perkins&Will and architect of record BCDM Architects, has its own athletic facilities but shares a pool, weight room, and more with the 30,000-sf YMCA.

Image by kalhh from Pixabay
Market Data | Apr 1, 2024

Nonresidential construction spending dips 1.0% in February, reaches $1.179 trillion

National nonresidential construction spending declined 1.0% in February, 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 $1.179 trillion.

Photo by Sigmund on Unsplash - Biden Administration considers ways to influence local housing regulations
Affordable Housing | Apr 1, 2024

Biden Administration considers ways to influence local housing regulations

The Biden Administration is considering how to spur more affordable housing construction with strategies to influence reform of local housing regulations.

Photo by Gautam Krishnan on Unsplash - Chicago voters nix ‘mansion tax’ to fund efforts to reduce homelessness
Affordable Housing | Apr 1, 2024

Chicago voters nix ‘mansion tax’ to fund efforts to reduce homelessness

Chicago voters in March rejected a proposed “mansion tax” that would have funded efforts to reduce homelessness in the city.

Photo by Daniel Fazio on Unsplash - New technical bulletin covers window opening control devices
Standards | Apr 1, 2024

New technical bulletin covers window opening control devices

A new technical bulletin clarifies the definition of a window opening control device (WOCD) to promote greater understanding of the role of WOCDs and provide an understanding of a WOCD’s function.

boombox1 - default
boombox2 -

Top Articles

native1 -

More In Category

halfpage1 -

Most Popular Content

  1. 2021 Giants 400 Report
  2. Top 150 Architecture Firms for 2019
  3. 13 projects that represent the future of affordable housing
  4. Sagrada Familia completion date pushed back due to coronavirus
  5. Top 160 Architecture Firms 2021