While suspended, lay-in ceilings have long been the norm in commercial design, the open-plenum ceiling has become trendy and economical, particularly in office and retail environments. However, calculating the tradeoffs between cost and performance can be tricky.
Very little data exists comparing suspended ceilings with open ceilings on the basis of cost and performance. The most recent study came from the Ceilings & Interior Systems Construction Association (www.cisca.org) five years ago. In the study, office and retail spaces were modeled in Chicago, Charlotte, Oklahoma City, Orlando, and Phoenix to reflect the differences in energy costs, climate, and installation costs. Initial construction costs were determined using RSMeans data; annual operating costs for HVAC, lighting, and maintenance were calculated according to Building Owners and Managers Association data.
The study found initial construction costs for suspended ceilings to be 15-22% higher in offices, and 4-11% higher in retail spaces. However, total energy savings for lay-in ceilings vs. open plenums were 9-10.3% in offices and 12.7-17% for retail. A 10.5% energy reduction qualifies buildings for a LEED EA credit, and a 14% reduction is good for two points.
The study attributed the energy performance advantage of suspended ceilings to the use of a return air plenum with low static pressures and fan horsepower vs. ducted air returns with higher static pressures and fan horsepower in open-plenum systems. In addition, return air plenums more efficiently remove heat from lighting systems and reduce the AC load. Suspended ceilings also offer about 20% higher light reflectance, thereby reducing lighting costs.
For more information, see: http://www.cisca.org/files/public/LCS_brochure_rev_9-08_lo-res.pdf.
Related Stories
| Aug 11, 2010
More construction firms likely to perform stimulus-funded work in 2010 as funding expands beyond transportation programs
Stimulus funded infrastructure projects are saving and creating more direct construction jobs than initially estimated, according to a new analysis of federal data released today by the Associated General Contractors of America. The analysis also found that more contractors are likely to perform stimulus funded work this year as work starts on many of the non-transportation projects funded in the initial package.
| Aug 11, 2010
Broadway-style theater headed to Kentucky
One of Kentucky's largest performing arts venues should open in 2011—that's when construction is expected to wrap up on Eastern Kentucky University's Business & Technology Center for Performing Arts. The 93,000-sf Broadway-caliber theater will seat 2,000 audience members and have a 60×24-foot stage proscenium and a fly loft.
| Aug 11, 2010
Citizenship building in Texas targets LEED Silver
The Department of Homeland Security's new U.S. Citizenship and Immigration Services facility in Irving, Texas, was designed by 4240 Architecture and developed by JDL Castle Corporation. The focal point of the two-story, 56,000-sf building is the double-height, glass-walled Ceremony Room where new citizens take the oath.
| Aug 11, 2010
Brooklyn's tallest building reaches 514 feet
With the Brooklyner now topped off, the 514-foot-high apartment tower is Brooklyn's tallest building. Designed by New York-based Gerner Kronick + Valcarcel Architects and developed by The Clarett Group, the soaring 51-story tower is constructed of cast-in-place concrete and clad with window walls and decorative metal panels.
| Aug 11, 2010
Carpenters' union helping build its own headquarters
The New England Regional Council of Carpenters headquarters in Dorchester, Mass., is taking shape within a 1940s industrial building. The Building Team of ADD Inc., RDK Engineers, Suffolk Construction, and the carpenters' Joint Apprenticeship Training Committee, is giving the old facility a modern makeover by converting the existing two-story structure into a three-story, 75,000-sf, LEED-certif...
| Aug 11, 2010
Wisconsin becomes the first state to require BIM on public projects
As of July 1, the Wisconsin Division of State Facilities will require all state projects with a total budget of $5 million or more and all new construction with a budget of $2.5 million or more to have their designs begin with a Building Information Model. The new guidelines and standards require A/E services in a design-bid-build project delivery format to use BIM and 3D software from initial ...
| Aug 11, 2010
News Briefs: GBCI begins testing for new LEED professional credentials... Architects rank durability over 'green' in product attributes... ABI falls slightly in April, but shows market improvement
News Briefs: GBCI begins testing for new LEED professional credentials... Architects rank durability over 'green' in product attributes... ABI falls slightly in April, but shows market improvement
