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
Multifamily Housing | Aug 23, 2023
Constructing multifamily housing buildings to Passive House standards can be done at cost parity
All-electric multi-family Passive House projects can be built at the same cost or close to the same cost as conventionally designed buildings, according to a report by the Passive House Network. The report included a survey of 45 multi-family Passive House buildings in New York and Massachusetts in recent years.
Regulations | Aug 23, 2023
Gas industry drops legal challenge to heat pump requirement in Washington building code
Gas and construction industry groups recently moved to dismiss a lawsuit they had filed to block new Washington state building codes that require heat pumps in new residential and commercial construction. The lawsuit contended that the codes harm the industry groups’ business, interfere with consumer energy choice, and don’t comply with federal law.
Government Buildings | Aug 23, 2023
White House wants to ‘aggressively’ get federal workers back to the office
The Biden administration wants to “aggressively” get federal workers back in the office by September or October. “We are returning to in-person work because it is critical to the well-being of our teams and will enable us to deliver better results for the American people,” according to an email by White House Chief of Staff Jeff Zients. The administration will not eliminate remote work entirely, though.
Building Owners | Aug 23, 2023
Charles Pankow Foundation releases free project delivery selection tool for building owners, developers, and project teams
Building owners and project teams can use the new Building Owner Assessment Tool (BOAT) to better understand how an owner's decision-making profile impacts outcomes for different project delivery methods.
Giants 400 | Aug 22, 2023
2023 Giants 400 Report: Ranking the nation's largest architecture, engineering, and construction firms
A record 552 AEC firms submitted data for BD+C's 2023 Giants 400 Report. The final report includes 137 rankings across 25 building sectors and specialty categories.
Apartments | Aug 22, 2023
Key takeaways from RCLCO's 2023 apartment renter preferences study
Gregg Logan, Managing Director of real estate consulting firm RCLCO, reveals the highlights of RCLCO's new research study, “2023 Rental Consumer Preferences Report.” Logan speaks with BD+C's Robert Cassidy.
Shopping Centers | Aug 22, 2023
The mall of the future
There are three critical aspects of mall design that, through evolution, have proven to be instrumental in the staying power of a retail destination: parking, planning, and customer experience. This are crucial to the mall of the future.
Healthcare Facilities | Aug 21, 2023
Sutter Health’s new surgical care center finishes three months early, $3 million under budget
Sutter Health’s Samaritan Court Ambulatory Care and Surgery Center (Samaritan Court), a three-story, 69,000 sf medical office building, was recently completed three months early and $3 million under budget, according to general contractor Skanska.
Healthcare Facilities | Aug 18, 2023
Psychiatric hospital to feature biophilic elements, aim for net-zero energy
A new 521,000 sf, 350-bed behavioral health hospital in Lakewood, Wash., a Tacoma suburb, will serve forensic patients who enter care through the criminal court system, freeing other areas of campus to serve civil patients. The facility at Western State Hospital, to be designed by HOK, will promote a holistic approach to rehabilitation as part of the state’s vision for transforming behavioral health.
Vertical Transportation | Aug 17, 2023
Latest version of elevator safety code has more than 100 changes
A new version of ASME A17.1/CSA B44, a safety code for elevators, escalators, and related equipment developed by the American Society of Mechanical Engineers, will be released next month.
