Benchmarking Study for State Facilities on Oahu


InSynergy Engineering, Inc. provided the mechanical and electrical engineering design work for preparation of a benchmark analysis study for state facilities on the island of Oahu. Our scope of work included carrying out the following data collection activities:

  • Obtained and reviewed previous reports, energy audits, and spreadsheets prepared under the State Energy Analysis Project, Phases I and II.  Identified which buildings were surveyed/audited, and summarized the results of the analysis for each building, including total energy consumption, square footage, end-use energy, and energy savings, costs, and payback for each Energy Conservation Measure (ECM) Identified.
  • Verified and obtained electrical consumption data from Hawaiian Electric Company, Inc. (HECO) on all HECO installed and other meters for state facility buildings.  Determined the total state facility Oahu energy usage and load profiles for major accounts, and for each building that has been metered.
  • Met with representatives from each agency to collect information to support the benchmark analysis, including an inventory listing each agency’s buildings, along with a description of use and floor area; survey and copy of any reports from previously conducted energy studies or audits; and a listing of any other recent upgrades or recommendations to their facilities.
  • Conducted a two-day field survey of the existing sites to observe conditions and the condition of buildings that were previously assessed during the audit.

We performed the analyses of data, as follows:

  • Developed a spreadsheet for all buildings that were previously surveyed/audited and metered that summarizes the energy consumption, square footage, electric EUUI operating costs, and the energy savings, costs, and payback for each previously developed ECM.
  • Extrapolated the data for previously metered and surveyed/audited buildings to the remaining State facilities on Oahu using engineering judgment and the information collected.  Developed a separate spreadsheet for these buildings, including projected information on the energy consumption, square footage, EUI, and energy savings, cost and simple payback for possible ECMs.
  • Developed spreadsheets, which organize the buildings by agency, EUIs, age, square footage, operating costs, energy savings potential, ECM costs, and payback.  Summarized the current energy consumption levels of each building, and identify and prioritize the buildings that have the largest potential for energy savings.
  • Developed a spreadsheet which lists potential candidates for energy performance contracting.

We then prepared and provided to the State a technical report summarizing the findings and recommendations of the study.


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