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
| Jan 11, 2014
Getting to net-zero energy with brick masonry construction [AIA course]
When targeting net-zero energy performance, AEC professionals are advised to tackle energy demand first. This AIA course covers brick masonry's role in reducing energy consumption in buildings.
| Jan 10, 2014
What the states should do to prevent more school shootings
To tell the truth, I didn’t want to write about the terrible events of December 14, 2012, when 20 children and six adults were gunned down at Sandy Hook Elementary School in Newtown, Conn. I figured other media would provide ample coverage, and anything we did would look cheap or inappropriate. But two things turned me around.
| Jan 10, 2014
Special Report: K-12 school security in the wake of Sandy Hook
BD+C's exclusive five-part report on K-12 school security offers proven design advice, technology recommendations, and thoughtful commentary on how Building Teams can help school districts prevent, or at least mitigate, a Sandy Hook on their turf.
| Jan 10, 2014
Resiliency, material health among top AEC focuses for 2014: Perkins+Will survey
Architectural giant Perkins+Will recently surveyed its staff of 1,500 design pros to forcast hot trends in the AEC field for 2014. The resulting Design + Insights Survey reflects a global perspective.
| Jan 9, 2014
How security in schools applies to other building types
Many of the principles and concepts described in our Special Report on K-12 security also apply to other building types and markets.
| Jan 9, 2014
16 recommendations on security technology to take to your K-12 clients
From facial recognition cameras to IP-based door hardware, here are key technology-related considerations you should discuss with your school district clients.
| Jan 9, 2014
Harley Ellis Devereaux, BFHL Architects announce merger
Effective January 1, 2014, Ralph Lotito and Brett Paloutzian have merged BFHL, comprising 15 healthcare architects, with Harley Ellis Devereaux. A national architecture and engineering firm in practice since 1908, Harley Ellis Devereaux has offices in Chicago, Detroit, Los Angeles, San Diego and San Francisco, CA.
| Jan 9, 2014
Special report: Can design prevent another Sandy Hook?
Our experts say no, but it could save lives. In this report, they offer recommendations on security design you can bring to your K-12 clients to prevent, or at least mitigate, a Sandy Hook on their turf.
| Jan 7, 2014
Concrete solutions: 9 innovations for a construction essential
BD+C editors offer a roundup of new products and case studies that represent the latest breakthroughs in concrete technology.
Smart Buildings | Jan 7, 2014
9 mega redevelopments poised to transform the urban landscape
Slowed by the recession—and often by protracted negotiations—some big redevelopment plans are now moving ahead. Here’s a sampling of nine major mixed-use projects throughout the country.