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 21, 2012
ABI gains for fourth straight month
Positive business conditions for all building sectors.
| Dec 17, 2012
CSM Group names recipient of the CSM Architect Fellowship Grant
With the money from the grant, Harlow has chosen to use it entirely for the Chapter of American Institute of Architecture Student’s Freedom by Design Program at Andrews University.
| Dec 9, 2012
AIA: Laboratory design, building for breakthrough science
To earn 1.0 AIA/CES learning units, study the article carefully and take the exam.
| Dec 9, 2012
The owner’s perspective: high-rise buildings
Douglas Durst on the practicalities of development: “You must think about a building from the inside out.”
| Dec 9, 2012
Greenzone pop quiz
Greenbuild attendees share their thoughts with BD+C on the SAGE modular classroom.
| Dec 9, 2012
Modular classroom building makes the grade
SAGE modular classroom opens eyes, minds at Greenbuild 2012.
| Dec 9, 2012
14 great solutions
Welcome to the third installment of Building Design+Construction’s “Great Solutions,” highlighting 14 innovative technologies and products that you can put to work in your next project.
| Dec 9, 2012
AEC professionals cautiously optimistic about commercial construction in ’13
Most economists say the U.S. is slowly emerging from the Great Recession, a view that was confirmed to some extent by an exclusive survey of 498 BD+C subscribers whose views we sought on the commercial construction industry’s outlook on business prospects for 2013.
