New Buildings Institute (NBI) has developed the first ever set of plug load energy use metrics, which will allow commercial building owners and managers to more easily gain insight into their buildings’ energy use and become more energy efficient. Earlier this year, PECI used the NBI metrics to assess plug load energy use at PECI headquarters in the First and Main building in downtown Portland, Oregon. The study, which informed an energy-saving campaign, resulted in an 18 percent kWh reduction of PECI’s plug load.
Review New Buildings Institute Metrics, “Methodology for Reporting Commercial Office Plug Load Energy Use” and PECI case study, “Analyzing Plug Loads.”
According to the Energy Information Agency, plug load – which is defined as electricity use by equipment that plugs into a building’s electrical outlets – is one of the fastest-growing sources of energy use in commercial buildings. In typical offices, 15 to 20 percent of energy use can be attributed to the plug load of computers, monitors, printers, desk lamps, telephones, etc. In buildings with HVAC and/or lighting systems that have been upgraded or improved to be more energy-efficient, plug load can reach as high as 50 percent of total energy use.
The intent of NBI’s new metrics is to set a benchmark for plug load energy use and make it easier for building owners and managers to spot opportunities to improve energy efficiency. The methodology allows an apples-to-apples comparison of plug load energy use across commercial buildings, even if they have vastly different plug load makeups and characteristics.
PECI helped NBI test the theories behind their metrics during a study conducted in the Portland offices of PECI. PECI’s LEED Platinum office is equipped with an energy management system that allows circuit-level monitoring of energy use throughout the office space. This fact, coupled with PECI’s commitment to the study, practice and influence of responsible energy management, made the site – and the pairing – ideal.
NBI’s metrics showed that PECI’s plug load performance during business hours was already quite good, with numbers comparable to the metrics’ lowest reference value. Overnight, however, PECI’s plug load rated more poorly, with values above the metrics’ median.
“We discovered our higher overnight plug load was primarily due to people leaving their computers in ‘sleep mode’ when they left the office for the day,” said Joan Effinger, Engineering Manager at PECI. “We were excited to use the findings as an opportunity to improve.” PECI launched an internal campaign to motivate people to completely shut off their computers at the end of the day, which contributed to an 18 percent kWh reduction of plug load.
“It was very valuable to conduct such a successful test in a real-world situation,” said Cathy Higgins, Research Director of NBI. “Hopefully this is the first of many cases when people use these new metrics to improve the performance of buildings and reduce energy and cost.”
[1] Plug loads are a part of what is known as Miscellaneous Electrical Loads (MELS)
About PECI
PECI is a nonprofit corporation dedicated to creating the new energy economy. We are leaders in the field of energy resource management, with expertise in designing and implementing energy efficiency programs for utility and government agency clients. Our work helps millions of residential, commercial and industrial utility customers reliably save energy and money. We were founded in 1979 in Portland, Oregon and currently work with clients nationwide. To learn more, visit www.peci.org.
About NBI
Established in 1997, New Buildings Institute (NBI) has been a driving force in advancing energy code stringency, most notably with the adoption of the 2012 International Energy Conservation Code (IECC), which was based largely on NBI's Core Performance Guide--a prescriptive approach to high performance commercial buildings. The organization also advocates for measuring building energy performance in occupancy rather than relying on modeled predictions to assess efficiency levels, and has become a clearinghouse on zero-net energy policies and practices. To learn more about NBI go towww.newbuildings.org or call 360.567.0950.
Related Stories
Market Data | Apr 1, 2024
Nonresidential construction spending dips 1.0% in February, reaches $1.179 trillion
National nonresidential construction spending declined 1.0% in February, according to an Associated Builders and Contractors analysis of data published today by the U.S. Census Bureau. On a seasonally adjusted annualized basis, nonresidential spending totaled $1.179 trillion.
Affordable Housing | Apr 1, 2024
Biden Administration considers ways to influence local housing regulations
The Biden Administration is considering how to spur more affordable housing construction with strategies to influence reform of local housing regulations.
Affordable Housing | Apr 1, 2024
Chicago voters nix ‘mansion tax’ to fund efforts to reduce homelessness
Chicago voters in March rejected a proposed “mansion tax” that would have funded efforts to reduce homelessness in the city.
Standards | Apr 1, 2024
New technical bulletin covers window opening control devices
A new technical bulletin clarifies the definition of a window opening control device (WOCD) to promote greater understanding of the role of WOCDs and provide an understanding of a WOCD’s function.
Adaptive Reuse | Mar 30, 2024
Hotel vs. office: Different challenges in commercial to residential conversions
In the midst of a national housing shortage, developers are examining the viability of commercial to residential conversions as a solution to both problems.
Sustainability | Mar 29, 2024
Demystifying carbon offsets vs direct reductions
Chris Forney, Principal, Brightworks Sustainability, and Rob Atkinson, Senior Project Manager, IA Interior Architects, share the misconceptions about carbon offsets and identify opportunities for realizing a carbon-neutral building portfolio.
Reconstruction & Renovation | Mar 28, 2024
Longwood Gardens reimagines its horticulture experience with 17-acre conservatory
Longwood Gardens announced this week that Longwood Reimagined: A New Garden Experience, the most ambitious revitalization in a century of America’s greatest center for horticultural display, will open to the public on November 22, 2024.
Office Buildings | Mar 27, 2024
A new Singapore office campus inaugurates the Jurong Innovation District, a business park located in a tropical rainforest
Surbana Jurong, an urban, infrastructure and managed services consulting firm, recently opened its new headquarters in Singapore. Surbana Jurong Campus inaugurates the Jurong Innovation District, a business park set in a tropical rainforest.
Cultural Facilities | Mar 27, 2024
Kansas City’s new Sobela Ocean Aquarium home to nearly 8,000 animals in 34 habitats
Kansas City’s new Sobela Ocean Aquarium is a world-class facility home to nearly 8,000 animals in 34 habitats ranging from small tanks to a giant 400,000-gallon shark tank.
Market Data | Mar 26, 2024
Architecture firm billings see modest easing in February
Architecture firm billings continued to decline in February, with an AIA/Deltek Architecture Billings Index (ABI) score of 49.5 for the month. However, February’s score marks the most modest easing in billings since July 2023 and suggests that the recent slowdown may be receding.
