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
Airports | Sep 10, 2020
The Weekly show: Curtis Fentress, FAIA, on airport design, and how P3s are keeping university projects alive
The September 10 episode of BD+C's "The Weekly" is available for viewing on demand.
Architects | Sep 8, 2020
The New City project by Eric Owen Moss Architects receives AIA’s Twenty-five Year Award
AIA’s Twenty-five Year Award is conferred on a building that has set a precedent for the last 25-35 years and continues to set standards of excellence for its architectural design and significance.
Architects | Sep 1, 2020
An evidenced-based approach to elevate the workplace experience
A new NBBJ report presents design concepts for providing people with opportunities to recharge and engage in the workplace.
K-12 Schools | Sep 1, 2020
The rise of inquiry-based learning in K-12 communities
Inquiry-based education offers a methodology that does not rely solely on the educator being the lead in all learning.
Giants 400 | Aug 28, 2020
2020 Giants 400 Report: Ranking the nation's largest architecture, engineering, and construction firms
The 2020 Giants 400 Report features more than 130 rankings across 25 building sectors and specialty categories.
Architects | Aug 27, 2020
Strategically planning your firm past the COVID-19 pandemic
As AEC firm leaders consider worst-case scenarios and explore possible solutions to surmount them, they learn to become nimble, quick, and ready to pivot as circumstances demand.
Digital Twin | Aug 27, 2020
The Weekly show: Digital twin technology and social equity in the AEC market
The August 27 episode of BD+C's "The Weekly" is available for viewing on demand.
Architects | Aug 26, 2020
We the People: Four steps for the architecture profession to build unity through design
Architect offers a 4-point manifesto to the design community to work for racial and social justice in the U.S. following the death of George Floyd.
Coronavirus | Aug 25, 2020
Video: 5 building sectors to watch amid COVID-19
RCLCO's Brad Hunter reveals the winners and non-winners of the U.S. real estate market during the coronavirus pandemic.
Architects | Aug 19, 2020
Japan’s Tokyo Toilet project looks to improve the perception of public restrooms
17 toilets throughout Shibuya will be redesigned as part of the project.