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
Sports and Recreational Facilities | Mar 30, 2023
New University of St. Thomas sports arena will support school's move to Division I athletics
The University of St. Thomas in Saint Paul, Minn., last year became the first Division III institution in the modern NCAA to transition directly to Division I. Plans for a new multipurpose sports arena on campus will support that move.
Healthcare Facilities | Mar 26, 2023
UC Davis Health opens new eye institute building for eye care, research, and training
UC Davis Health recently marked the opening of the new Ernest E. Tschannen Eye Institute Building and the expansion of the Ambulatory Care Center (ACC). Located in Sacramento, Calif., the Eye Center provides eye care, vision research, and training for specialists and investigators. With the new building, the Eye Center’s vision scientists can increase capacity for clinical trials by 50%.
Libraries | Mar 26, 2023
An abandoned T.J. Maxx is transformed into a new public library in Cincinnati
What was once an abandoned T.J. Maxx store in a shopping center is now a vibrant, inviting public library. The Cincinnati & Hamilton County Public Library (CHPL) has transformed the ghost store into the new Deer Park Library, designed by GBBN.
Multifamily Housing | Mar 24, 2023
Momentum building for green retrofits in New York City co-ops, condos
Many New York City co-op and condo boards had been resistant to the idea of approving green retrofits and energy-efficiency upgrades, but that reluctance might be in retreat.
Legislation | Mar 24, 2023
New York lawmakers set sights on unsafe lithium-ion batteries used in electric bikes and scooters
Lawmakers in New York City and statewide have moved to quell the growing number of fires caused by lithium-ion batteries used in electric bikes and scooters.
Multifamily Housing | Mar 24, 2023
Multifamily developers offering new car-free projects in car-centric cities
Cities in the South and Southwest have eased zoning rules with parking space mandates in recent years to allow developers to build new housing with less parking.
Multifamily Housing | Mar 24, 2023
Coastal multifamily developers, owners expect huge jump in insurance costs
In Texas and Florida, where Hurricane Ian caused $50 billion in damage last year, insurance costs are nearly 50% higher than in 2022.
Multifamily Housing | Mar 24, 2023
Average size of new apartments dropped sharply in 2022
The average size of new apartments in 2022 dropped sharply in 2022, as tracked by RentCafe. Across the U.S., the average new apartment size was 887 sf, down 30 sf from 2021, which was the largest year-over-year decrease.
Government Buildings | Mar 24, 2023
19 federal buildings named GSA Design Awards winners
After a six-year hiatus, the U.S. General Services Administration late last year resumed its esteemed GSA Design Awards program. In all, 19 federal building projects nationwide were honored with 2022 GSA Design Awards, eight with Honor Awards and 11 with Citations.
Transportation & Parking Facilities | Mar 23, 2023
Amsterdam debuts underwater bicycle parking facility that can accommodate over 4,000 bikes
In February, Amsterdam saw the opening of a new underwater bicycle parking facility. Located in the heart of the city—next to Amsterdam Central Station and under the river IJ (Amsterdam’s waterfront)—the facility, dubbed IJboulevard, has parking spots for over 4,000 bicycles, freeing up space on the street.