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
| Nov 17, 2014
Developments in 3D printing can assist architecture in the smallest details
Researchers at the Department of Energy’s Oak Ridge National Laboratory (ORNL) have developed a way for 3D printed metals to be produced with an unprecedented degree of precision.
| Nov 17, 2014
A new BSL-3 public-safety lab debuts in Vermont
The laboratory will be used to perform a wide range of analyses to detect biological, toxicological, chemical, and radiological threats to the health of the population, from testing for rabies, West Nile, pertussis and salmonella to water and food contaminants.
| Nov 17, 2014
Workplace pilot programs: A new tool for creating workspaces employees love
In a recent article for Fast Company, CannonDesign's Meg Osman details how insurance giant Zurich used a workplace pilot program to empower its employees in the creation of its new North American headquarters.
| Nov 17, 2014
Mastering natural ventilation: 5 crucial lessons from design experts
By harnessing natural ventilation, Building Teams can achieve a tremendous reduction in energy use and increase in occupant comfort. Engineers from SOM offer lessons from the firm’s recent work.
| Nov 14, 2014
Bjarke Ingels unveils master plan for Smithsonian's south mall campus
The centerpiece of the proposed plan is the revitalization of the iconic Smithsonian castle.
| Nov 14, 2014
Haskell acquires FreemanWhite, strengthens healthcare design-build business
The combination expands Haskell’s geographic presence by adding FreemanWhite’s offices in Chicago, Charlotte, Nashville, and San Diego. FreemanWhite will retain its name and brand.
| Nov 14, 2014
What college students want in their living spaces
In a recent workshop with 62 college students, architects from Little explored the changing habits and preferences of today's students, and how those changes affect their living spaces.
Sponsored | | Nov 12, 2014
Eye-popping façade highlights renovation, addition at Chaffin Junior High School
The new distinctive main entrance accentuates the public face of the school with an aluminum tube “baguette” system.
Sponsored | | Nov 12, 2014
Williams Scotsman plugs into the jobsite
Many of our customers conduct important business from their temporary modular jobsite office and most require access to technology to get their job done effectively and efficiently. SPONSORED CONTENT
| Nov 12, 2014
Chesapeake Bay Foundation completes uber-green Brock Environmental Center, targets Living Building certification
More than a decade after opening its groundbreaking Philip Merrill Environmental Center, the group is back at it with a structure designed to be net-zero water, net-zero energy, and net-zero waste.