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
Libraries | Jul 20, 2022
Canada to open one of the world’s largest library and archive facilities
When it opens in 2026, Ādisōke is expected to be one of the largest library and archive facilities in the world.
Energy-Efficient Design | Jul 19, 2022
All is not lost: 3 ways architects can respond to the Supreme Court’s EPA ruling
The U.S. Supreme Court’s ruling to limit the Environmental Protection Agency’s power to regulate greenhouse gas (GHG) emissions from power plants dealt a significant blow to our ability to fight the climate crisis with federal policy.
Women in Design+Construction | Jul 18, 2022
Registration is open for BD+C's 2022 Women in Design+Construction Conference
Join your AEC industry peers in Chicago, September 26-28, 2022, for the 7th annual Women in Design+Construction Conference, hosted by the BD+C editorial team and the 35-person WIDC Advisory Board.
Airports | Jul 18, 2022
FAA will award nearly $1 billion for airport projects
The Federal Aviation Administration (FAA) will award nearly $1 billion to 85 airports of all sizes across the country to improve terminals.
Building Team | Jul 18, 2022
Understanding the growing design-build market
FMI’s new analysis of the design-build market forecast for the next fives years shows that this delivery method will continue to grow, despite challenges from the COVID-19 pandemic.
Mixed-Use | Jul 18, 2022
Mixed-use development outside Prague uses a material made from leftover bricks
Outside Prague, the Sugar Factory, a mixed-used residential development with public space, marks the largest project to use the sustainable material Rebetong.
Building Team | Jul 15, 2022
ABC: Construction materials prices increased in June, up 20% from a year ago
Construction input prices increased 1.9% in June compared to the previous month, according to an Associated Builders and Contractors analysis of U.S. Bureau of Labor Statistics’ Producer Price Index data released today.
Arenas | Jul 15, 2022
U. of Oregon renovation aims for ‘finest track and field facility in the world’
The renovation of the University of Oregon’s Hayward Field had the goal of creating the “finest track and field facility in the world.”
Sustainable Development | Jul 14, 2022
Designing for climate change and inclusion, with CBT Architects' Kishore Varanasi and Devanshi Purohit
Climate change is having a dramatic impact on urban design, in terms of planning, materials, occupant use, location, and the long-term effect of buildings on the environment. Joining BD+C's John Caulfield to discuss this topic are two experts from the Boston-based CBT Architects: Kishore Varanasi, a Principal and director of urban design; and Devanshi Purohit, an Associate Principal.
Building Team | Jul 14, 2022
Austin PBS gets a new state-of-the-art facility with three studios
Since the 1970s, Austin PBS, birthplace of the Austin City Limits TV series, has been based inside the communications building on the University of Texas campus—a space it has long outgrown.