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
| Oct 7, 2013
How to streamline your operations
The average U.S. office worker generates two pounds of paper each day, according to the EPA. Ninety percent of that trash is made up of printed materials: marketing reports, project drafts, copy machine mistakes, and unwanted mail. Here are a few ways AEC firms can streamline their management processes.
| Oct 7, 2013
Reimagining the metal shipping container
With origins tracing back to the mid-1950s, the modern metal shipping container continues to serve as a secure, practical vessel for transporting valuable materials. However, these reusable steel boxes have recently garnered considerable attention from architects and constructors as attractive building materials.
| Oct 7, 2013
Geothermal system, energy-efficient elevator are key elements in first net-zero public high school in Rhode Island
The school will employ a geothermal system to heat and cool a portion of the building. Other energy-saving measures will include LED lighting, room occupancy sensors, and an energy-efficient elevator.
| Oct 6, 2013
3 dwellings designed with resiliency in mind
The CORE House, Shotgun Remix, and Resilient House were named the winners of the Designing Recovery competition, which aims to create housing with an ideal combination of disaster mitigation features and livability.
| Oct 4, 2013
Sydney to get world's tallest 'living' façade
The One Central Park Tower development consists of two, 380-foot-tall towers covered in a series of living walls and vertical gardens that will extend the full height of the buildings.
| Oct 4, 2013
Mack Urban, AECOM acquire six acres for development in LA's South Park district
Mack Urban and AECOM Capital, the investment fund of AECOM Technology Corporation (NYSE: ACM), have acquired six acres of land in downtown Los Angeles’ South Park district located in the central business district (CBD).
| Oct 4, 2013
CRB opens Atlanta office
Georgia’s status as a burgeoning hub for the life sciences industry has fueled CRB’s decision to open an office in Atlanta to better serve its clients in the market. CRB is a leading provider of engineering, design and construction services for customers in the biotech, pharmaceutical and life sciences industries.
| Oct 2, 2013
40 Under 40 retrospective: Where are they now?
BD+C catches up with two past 40 Under 40 honorees: a designer who credits trapeze work with boosting her confidence, and a security expert who also knows a lot about squash.
| Oct 2, 2013
Corporate HQ in 10 months made possible with BIM coordination
An integrated Building Team uses BIM/VDC to convert a 1940s-era industrial building into a flashy new headquarters for Hillshire Brands in a matter of months.
| Oct 1, 2013
13 structural steel buildings that dazzle
The Barclays Center arena in Brooklyn and the NASCAR Hall of Fame in Charlotte, N.C., are among projects named 2013 IDEAS2 winners by the American Institute of Steel Construction.
