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
| Dec 13, 2010
Energy efficiency No. 1 priority for commercial office tenants
Green building initiatives are a key influencer when tenants decide to sign a commercial real estate lease, according to a survey by GE Capital Real Estate. The survey, which was conducted over the past year and included more than 2,220 office tenants in the U.S., Canada, France, Germany, Sweden, the UK, Spain, and Japan, shows that energy efficiency remains the No. 1 priority in most countries. Also ranking near the top: waste reduction programs and indoor air.
| Dec 7, 2010
Are green building RFPs more important than contracts?
The Request for Proposal (RFP) process is key to managing a successful LEED project, according to Green Building Law Update. While most people think a contract is the key element to a successful construction project, successfully managing a LEED project requires a clear RFP that addresses many of the problems that can lead to litigation.
| Dec 7, 2010
Blue is the future of green design
Blue design creates places that are not just neutral, but actually add back to the world and is the future of sustainable design and architecture, according to an interview with Paul Eagle, managing director of Perkins+Will, New York; and Janice Barnes, principal at the firm and global discipline leader for planning and strategies.
| Dec 7, 2010
Green building thrives in shaky economy
Green building’s momentum hasn’t been stopped by the economic recession and will keep speeding through the recovery, while at the same time building owners are looking to go green more for economic reasons than environmental ones. Green building has grown 50% in the past two years; total construction starts have shrunk 26% over the same time period, according to “Green Outlook 2011” report. The green-building sector is expected to nearly triple by 2015, representing as much as $145 billion in new construction activity.
| Dec 7, 2010
USGBC: Wood-certification benchmarks fail to pass
The proposed Forest Certification Benchmark to determine when wood-certification groups would have their certification qualify for points in the LEED rating systemdid not pass the USGBC member ballot. As a result, the Certified Wood credit in LEED will remain as it is currently written. To date, only wood certified by the Forest Stewardship Council qualifies for a point in the LEED, while other organizations, such as the Sustainable Forestry Initiative, the Canadian Standards Association, and the American Tree Farm System, are excluded.
| Dec 7, 2010
Prospects for multifamily sector improve greatly
The multifamily sector is showing signs of a real recovery, with nearly 22,000 new apartment units delivered to the market. Net absorption in the third quarter surged by 94,000 units, dropping the national vacancy rate from 7.8% to 7.1%, one of the largest quarterly drops on record, and rents increased for the second quarter in a row.
| Dec 7, 2010
Hot rumor: Norman Foster designing Apple’s new campus
Lord Norman Foster, reportedly has been selected to design Apple’s new campus in Cupertino, Calif. If the news is true, Foster is a good match for Apple say experts. Foster built his celebrity by marrying big gestures to technological wizardry. And, unlike some starchitects, he has glommed onto the environmental revolution—something Apple has made a point of embracing, too.
| Dec 7, 2010
10 megacities of the near future
With Beijing, Shanghai, and Mumbai already on the global radar, where can the next wave of construction be found? Far beyond China, India, and even Brazil it’s predicted. The world’s next future megacities could include Istanbul, Turkey; Ho Chi Minh City, Vietnam; and Khartoum, Sudan, among others. Read about these emerging and little-known behemoths.
