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
| May 22, 2014
IKEA to convert original store into company museum
Due to open next year, the museum is expected to attract 200,000 people annually to rural Älmhult, Sweden, home of the first ever IKEA store.
| May 21, 2014
Evidence-based design practices for the palliative care environment
Palliative care strives to make patients comfortable as they are receiving treatment for a severe illness. As hospitals seek to avoid Affordable Care Act penalties for poor patient satisfaction, many expect this field to grow quickly.
| May 21, 2014
Gehry unveils plan for renovation, expansion of Philadelphia Museum of Art [slideshow]
Gehry's final design reorganizes and expands the building, adding more than 169,000 sf of space, much of it below the iconic structure.
| May 21, 2014
Architecture Billings Index in the negative for second consecutive month
The March ABI score was 49.6, up slightly from a mark of 48.8 in March, but still below the growth threshold of 50.
| May 20, 2014
Kinetic Architecture: New book explores innovations in active façades
The book, co-authored by Arup's Russell Fortmeyer, illustrates the various ways architects, consultants, and engineers approach energy and comfort by manipulating air, water, and light through the layers of passive and active building envelope systems.
| May 20, 2014
Using fire-rated glass in exterior applications
Fire-rated glazing and framing assemblies are just as beneficial on building exteriors as they are on the inside. But knowing how to select the correct fire-rated glass for exterior applications can be confusing. SPONSORED CONTENT
| May 20, 2014
World's best new skyscrapers: Renzo Piano's The Shard, China's 'doughnut hotel' voted to Emporis list
Eight other high-rise projects were named Emporis Skyscraper Award winners, including DC Tower 1 by Dominique Perrault Architecture and Tour Carpe Diem by Robert A.M. Stern.
| May 19, 2014
What can architects learn from nature’s 3.8 billion years of experience?
In a new report, HOK and Biomimicry 3.8 partnered to study how lessons from the temperate broadleaf forest biome, which houses many of the world’s largest population centers, can inform the design of the built environment.
| May 19, 2014
Why e-commerce won't kill 'bricks and mortar' retail sector
Despite emerging structural challenges and newly-announced store closings, such as those of Radio Shack and Office Depot, the U.S. retail sector has continued on its solid recovery.
| May 16, 2014
BoA, USGBC to offer $25,000 grants for green affordable housing projects
The Affordable Green Neighborhoods Grant Program will offer 14 grants to developers of affordable housing in North America who are committed to building sustainable communities through the LEED for Neighborhood Development program.