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
| Nov 9, 2010
Designing a library? Don’t focus on books
How do you design a library when print books are no longer its core business? Turn them into massive study halls. That’s what designers did at the University of Amsterdam, where they transformed the existing 27,000-sf library into a study center—without any visible books. About 2,000 students visit the facility daily and encounter workspaces instead of stacks.
| Nov 9, 2010
Turner Construction report: Green buildings still on the agenda
Green buildings continue to be on the agenda for real estate owners, developers, and corporate owner-occupants, according to the Turner 2010 Green Building Market Barometer. Key findings: Almost 90% of respondents said it was extremely or very likely they would incorporate energy-efficiency improvements in their new construction or renovation project, and 60% expected to incorporate improvements to water efficiency, indoor environmental quality, and green materials.
| Nov 5, 2010
New Millennium’s Gary Heasley on BIM, LEED, and the nonresidential market
Gary Heasley, president of New Millennium Building Systems, Fort Wayne, Ind., and EVP of its parent company, Steel Dynamics, Inc., tells BD+C’s Robert Cassidy about the Steel Joist Manufacturer’s westward expansion, its push to create BIM tools for its products, LEED, and the outlook for the nonresidential construction market.
| Nov 3, 2010
First of three green labs opens at Iowa State University
Designed by ZGF Architects, in association with OPN Architects, the Biorenewable Research Laboratory on the Ames campus of Iowa State University is the first of three projects completed as part of the school’s Biorenewables Complex. The 71,800-sf LEED Gold project is one of three wings that will make up the 210,000-sf complex.
| Nov 3, 2010
Park’s green education center a lesson in sustainability
The new Cantigny Outdoor Education Center, located within the 500-acre Cantigny Park in Wheaton, Ill., earned LEED Silver. Designed by DLA Architects, the 3,100-sf multipurpose center will serve patrons of the park’s golf courses, museums, and display garden, one of the largest such gardens in the Midwest.
| Nov 3, 2010
Public works complex gets eco-friendly addition
The renovation and expansion of the public works operations facility in Wilmette, Ill., including a 5,000-sf addition that houses administrative and engineering offices, locker rooms, and a lunch room/meeting room, is seeking LEED Gold certification.
| Nov 3, 2010
Sailing center sets course for energy efficiency, sustainability
The Milwaukee (Wis.) Community Sailing Center’s new facility on Lake Michigan counts a geothermal heating and cooling system among its sustainable features. The facility was designed for the nonprofit instructional sailing organization with energy efficiency and low operating costs in mind.
| Nov 3, 2010
Seattle University’s expanded library trying for LEED Gold
Pfeiffer Partners Architects, in collaboration with Mithun Architects, programmed, planned, and designed the $55 million renovation and expansion of Lemieux Library and McGoldrick Learning Commons at Seattle University. The LEED-Gold-designed facility’s green features include daylighting, sustainable and recycled materials, and a rain garden.
| Nov 3, 2010
Recreation center targets student health, earns LEED Platinum
Not only is the student recreation center at the University of Arizona, Tucson, the hub of student life but its new 54,000-sf addition is also super-green, having recently attained LEED Platinum certification.
| Nov 3, 2010
New church in Connecticut will serve a growing congregation
Tocci Building Companies will start digging next June for the Black Rock Congregational Church in Fairfield, Conn. Designed by Wiles Architects, the 103,000-sf multiuse facility will feature a 900-person worship center with tiered stadium seating, a children’s worship center, a chapel, an auditorium, a gymnasium, educational space, administrative offices, commercial kitchen, and a welcome center with library and lounge.
