The addition of air curtains in the International Green Construction Code (IgCC), the new comprehensive high performance green building code, promises energy and construction cost savings for commercial, industrial and institutional buildings.
Specifying air curtains as energy-saving, cost-cutting alternatives to vestibules in 3,000-square-foot buildings and larger has been a recent trend among consulting engineers and architects. However, many times specifications are blocked by local jurisdictions that have adopted the International Energy Construction Code (IECC), which doesn't yet sight air curtains as vestibule alternatives.
Thus, the newly-enacted IgCC, which is scheduled for March 2012 publishing, now provides an approved overlay of green construction products to the base code IECC, which is overseen by the International Code Council, the Washington-based organization responsible for providing minimum safety, sustainability and affordability building codes and standards.
Recent proposals to the IgCC by the Air Movement and Control Association International (AMCA), Arlington Heights, Ill., helped establish air curtains as a vestibule alternative with the stipulation that they're tested in accordance with ANSI/AMCA Standard 220-05, "Laboratory Methods of Testing Air Curtains for Aerodynamics Performance Ratings."
Also helpful in the code modification effort were recent studies proving air curtains as 10% more energy-efficient than vestibules. The three-month research study “Air Curtains: A Proven Alternative to Vestibule Design” used second-party validation from research/validation consultant, Blue Ridge Numerics, Charlottesville, Va., with certified results from proven computational fluid dynamics (CFD) analysis.
Besides energy savings, vestibules, especially in retail settings, consume anywhere from 25 to 250 square feet of usable retail space and carry construction costs ranging from $3,750 to $37,500, based on an average of $150/square feet construction costs.
Meanwhile air curtain proponents will continue to present energy efficiency data to code committees, in hopes of instituting the vestibule alternative measure into the IECC. The next meeting on the subject is scheduled in January 2013.
Related Stories
| Mar 2, 2011
How skyscrapers can save the city
Besides making cities more affordable and architecturally interesting, tall buildings are greener than sprawl, and they foster social capital and creativity. Yet some urban planners and preservationists seem to have a misplaced fear of heights that yields damaging restrictions on how tall a building can be. From New York to Paris to Mumbai, there’s a powerful case for building up, not out.
| Mar 1, 2011
Smart cities: getting greener and making money doing it
The Global Green Cities of the 21st Century conference in San Francisco is filled with mayors, architects, academics, consultants, and financial types all struggling to understand the process of building smarter, greener cities on a scale that's practically unimaginable—and make money doing it.
| Mar 1, 2011
How to make rentals more attractive as the American dream evolves, adapts
Roger K. Lewis, architect and professor emeritus of architecture at the University of Maryland, writes in the Washington Post about the rising market demand for rental housing and how Building Teams can make these properties a desirable choice for consumer, not just an economically prudent and necessary one.
| Mar 1, 2011
New survey shows shifts in hospital construction projects
America’s hospitals and health systems are focusing more on renovation or expansion than new construction, according to a new survey conducted by Health Facilities Management magazine and the American Society for Healthcare Engineering (ASHE). In fact, renovation or expansion accounted for 73% of construction projects at hospitals responding to the survey.
| Mar 1, 2011
AIA selects 6 communities for long-term sustainability program
The American Institute of Architects today announced it has selected 6 communities throughout the country to receive technical assistance under the Sustainable Design Assessment Team (SDAT) program in 2011. The communities selected are Shelburne, Vt., Apple Valley, Mn., Pikes Peak Region, Co., Southwest DeKalb County, Ga., Bastrop, Tx., and Santa Rosa, Ca. The SDAT program represents a significant institutional investment by the AIA in public service work to assist communities in developing policy frameworks and long term sustainability plans.
| Feb 24, 2011
Perkins+Will designs 100 LEED Certified buildings
Perkins+Will announced the Leadership in Energy and Environmental Design (LEED) certification of its 100th sustainable building, marking a key milestone for the firm and for the sustainable design industry. The Vancouver-based Dockside Green Phase Two Balance project marks the firm’s 100th LEED certified building and is tied for the highest scoring LEED building worldwide with its sister project, Dockside Green Phase One.
| Feb 24, 2011
New reports chart path to net-zero-energy commercial buildings
Two new reports from the Zero Energy Commercial Buildings Consortium (CBC) on achieving net-zero-energy use in commercial buildings say that high levels of energy efficiency are the first, largest, and most important step on the way to net-zero.
| Feb 24, 2011
Lending revives stalled projects
An influx of fresh capital into U.S. commercial real estate is bringing some long-stalled development projects back to life and launching new construction of apartments, office buildings and shopping centers, according to a Wall Street Journal article.
| Feb 23, 2011
London 2012: What Olympic Park looks like today
London 2012 released a series of aerial images that show progress at Olympic Park, including a completed roof on the stadium (where seats are already installed), tile work at the aquatic centre, and structural work complete on more than a quarter of residential projects at Olympic Village.
| Feb 23, 2011
Call for Entries: 2011 Building Team Awards, Deadline: March 25, 2011
The 14th Annual Building Team Awards recognizes newly built projects that exhibit architectural and construction excellence—and best exemplify the collaboration of the Building Team, including the owner, architect, engineer, and contractor.
