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
| Sep 10, 2014
Must See: Shape-shifting architecture that responds to heat
Students in Barcelona have created a composite material using shape memory polymers that can deform and return to their original state when activated by cues like heat, humidity, and light.
| Sep 10, 2014
Lessons for the shore: Bolstering resilience of the built environment
Nearly 32 million people, or 28% of the East Coast's population, live in areas lying within a mile of a shore line. The good news is that municipalities are starting to take action, writes Sasaki Associates.
| Sep 9, 2014
Using Facebook to transform workplace design
As part of our ongoing studies of how building design influences human behavior in today’s social media-driven world, HOK’s workplace strategists had an idea: Leverage the power of social media to collect data about how people feel about their workplaces and the type of spaces they need to succeed.
| Sep 9, 2014
Ranked: Top religious sector AEC firms [2014 Giants 300 Report]
Brasfield & Gorrie, Gensler, and Jacobs top BD+C's rankings of the nation's largest religious sector design and construction firms, as reported in the 2014 Giants 300 Report.
| Sep 9, 2014
Take a look at the hardhat of the future
A Los Angeles-based startup added augmented reality technology to a hardhat, creating a smart helmet.
| Sep 9, 2014
Frank Lloyd Wright's Annie Pfeiffer Chapel brought back to life using 3D printing
Restoration of the Frank Lloyd Wright-designed chapel was made possible (and affordable) thanks to 3D printing.
| Sep 8, 2014
First Look: Foster + Partners, Fernando Romero win competition for Mexico City's newest international airport
Designed to be the world’s most sustainable airport, the plan uses a single, compact terminal scheme in lieu of a cluster of buildings, offering shorter walking distances and fewer level changes, and eliminating the need for trains and tunnels.
| Sep 8, 2014
Trimble acquires Gehry Technologies, aims to create tools for linking office and job site
Trimble and Frank Gehry announced that they have entered into a strategic alliance to collaborate to transform the construction industry by further connecting the office to on-site construction technologies. As part of the alliance, Trimble has acquired Gehry Technologies.
| Sep 7, 2014
Ranked: Top state government sector AEC firms [2014 Giants 300 Report]
PCL Construction, Stantec, and AECOM head BD+C's rankings of the nation's largest state government design and construction firms, as reported in the 2014 Giants 300 Report.
| Sep 7, 2014
Hybrid healthcare: Revamping inefficient inpatient units to revenue-producing outpatient care
It's happening at community hospitals all over America: leadership teams are looking for ways to maintain margins by managing underutilized and non-revenue producing space. GS&P's David Magner explores nontraditional healthcare models.
