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
| Sep 28, 2011
Look who's coming to BD+C's Under-40 Leadership Summit
AEC industry "under-40 superstars" from top design and construction firms have signed up for BD+C's "Under-40 Leadership Summit."
| Sep 28, 2011
GBCI announces LEED fellow class of 2011
LEED Fellows represent green building industry's most accomplished professionals.
| Sep 28, 2011
Bradley sponsors design studio on intelligent buildings for UWM SARUP
The studio is taught by Gregory D. Thomson, assistant professor and co-director of the Institute for Ecological Design at UWM.
| Sep 23, 2011
Fire and hurricane rated glazed wall assemblies installed at multi-family residence in Florida
Fire and hurricane assemblies meet design and code requirements.
| Sep 23, 2011
ABI turns positive after four monthly declines
On the heels of a period of weakness in design activity, the Architecture Billings Index (ABI) took a sudden upturn in August.
| Sep 23, 2011
Under 40 Leadership Summit
Building Design+Construction’s Under 40 Leadership Summit takes place October 26-28, 2011 Hotel at the Monteleone in New Orleans. Discounted hotel rate deadline: October 2, 2011.