flexiblefullpage
billboard
interstitial1
catfish1
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
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.)

Related Stories

| Mar 29, 2011

City's design, transit system can ease gas costs

Some cities in the U.S. are better positioned to deal with rising gas prices than others because of their design and transit systems, according to CEOs for Cities, a Chicago-based nonprofit that works to build stronger cities. The key factor: whether residents have to drive everywhere, or have other options.

| Mar 29, 2011

Chicago’s Willis Tower to become a vertical solar farm

Chicago’s iconic Willis Tower (formerly the Sears Tower) is set to become a massive solar electric plant with the installation of a pilot solar electric glass project.

| Mar 29, 2011

Read up on Amazon.com's new green HQ

Phase IV of Amazon’s new headquarters in Seattle is nearly complete. The company has built 10 of the 11 buildings planned for its new campus in the South Lake Union neighborhood, and is on-track for a 2013 grand opening.

| Mar 29, 2011

Portuguese architect Eduardo Souto de Moura wins Pritzker Architecture Prize

Portugese architect Eduardo Souto de Moura, whose precisely-honed buildings reflect the influence of the late Chicago modernist Mies van der Rohe, is the 2011 winner of the Pritzker Architecture Prize, the field's highest honor.

| Mar 25, 2011

Qatar World Cup may feature carbon-fiber ‘clouds’

Engineers at Qatar University’s Department of Mechanical and Industrial Engineering are busy developing what they believe could act as artificial “clouds,” man-made saucer-type structures suspended over a given soccer stadium, working to shield tens of thousands of spectators from suffocating summer temperatures that regularly top 115 degrees Fahrenheit.

| Mar 23, 2011

AIA adds 13 new contract documents to Documents-on-Demand service

Web-based solution adds 13 popular Architect’s Scope of Services Documents to AIA Documents-on-Demand, providing easy access to documents anytime, anywhere.

| Mar 23, 2011

After 60 years of student lobbying, new activity center opens at University of Texas

The new Student Activity Center at the University of Texas campus, Austin, is the result of almost 60 years of students lobbying for another dedicated social and cultural center on campus. The 149,000-sf facility is designed to serve as the "campus living room," and should earn a LEED Gold certification, a first for the campus.

| Mar 23, 2011

Architecture Billings Index shows nominal increase

The American Institute of Architects (AIA) reported the February Architecture Billings Index score was 50.6, up slightly from a reading of 50.0 the previous month. This score reflects a modest increase in demand for design services (any score above 50 indicates an increase in billings). The new projects inquiry index was 56.4, compared to a mark of 56.5 in December.

| Mar 22, 2011

The American National Standards Institute accredits Stantec for greenhouse gas verification

Stantec Consulting Ltd.’s Atmospheric Environment Group has been awarded accreditation by the American National Standards Institute (ANSI) for verification of assertions related to greenhouse gas (GHG) emissions. The Scope of Accreditation is for verification of emissions and removals at the organizational level for Group 1 – General.

| Mar 22, 2011

Mayor Bloomberg unveils plans for New York City’s largest new affordable housing complex since the ’70s

Plans for Hunter’s Point South, the largest new affordable housing complex to be built in New York City since the 1970s, include new residences for 5,000 families, with more than 900 in this first phase. A development team consisting of Phipps Houses, Related Companies, and Monadnock Construction has been selected to build the residential portion of the first phase of the Queens waterfront complex, which includes two mixed-use buildings comprising more than 900 housing units and roughly 20,000 square feet of new retail space.

boombox1
boombox2
native1

More In Category

Healthcare Facilities

Watch on-demand: Key Trends in the Healthcare Facilities Market for 2024-2025

Join the Building Design+Construction editorial team for this on-demand webinar on key trends, innovations, and opportunities in the $65 billion U.S. healthcare buildings market. A panel of healthcare design and construction experts present their latest projects, trends, innovations, opportunities, and data/research on key healthcare facilities sub-sectors. A 2024-2025 U.S. healthcare facilities market outlook is also presented.




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