Overall Rating Gold - expired
Overall Score 76.08
Liaison Leah Ceperley
Submission Date March 1, 2019
Executive Letter Download

STARS v2.1

University of Dayton
OP-5: Building Energy Consumption

Status Score Responsible Party
Complete 2.63 / 6.00 Matthew Worsham
Sustainability and Energy Coordinator
Facilities Management
"---" indicates that no data was submitted for this field

Figures needed to determine total building energy consumption:
Performance Year Baseline Year
Grid-purchased electricity 277,817 MMBtu 235,171 MMBtu
Electricity from on-site renewables 77.96 MMBtu 0 MMBtu
District steam/hot water (sourced from offsite) 0 MMBtu 0 MMBtu
Energy from all other sources (e.g., natural gas, fuel oil, propane/LPG, district chilled water, coal/coke, biomass) 325,671 MMBtu 240,398 MMBtu
Total 603,565.96 MMBtu 475,569 MMBtu

Start and end dates of the performance year and baseline year (or 3-year periods):
Start Date End Date
Performance Year July 1, 2017 June 30, 2018
Baseline Year July 1, 2008 June 30, 2009

A brief description of when and why the building energy consumption baseline was adopted (e.g. in sustainability plans and policies or in the context of other reporting obligations):

Last year we reported July 2008 - June 2009 as baseline because it was the first year we had electric and natural gas data for all major accounts. We've discovered additional data since then but wanted to keep the same baseline year for this reporting year.

Gross floor area of building space:
Performance Year Baseline Year
Gross floor area of building space 4,624,873 Gross Square Feet 3,908,812 Gross Square Feet

Source-site ratio for grid-purchased electricity:

Total building energy consumption per unit of floor area:
Performance Year Baseline Year
Site energy 0.13 MMBtu / GSF 0.12 MMBtu / GSF
Source energy 0.26 MMBtu / GSF 0.25 MMBtu / GSF

Percentage reduction in total building energy consumption (source energy) per unit of floor area from baseline:

Degree days, performance year (base 65 °F / 18 °C):
Degree days (see help icon above)
Heating degree days 5,441 Degree-Days (°F)
Cooling degree days 1,083 Degree-Days (°F)

Floor area of energy intensive space, performance year:
Floor Area
Laboratory space 1,055,346 Square Feet
Healthcare space 3,964 Square Feet
Other energy intensive space

EUI-adjusted floor area, performance year:
6,771,399 Gross Square Feet

Building energy consumption (site energy) per unit of EUI-adjusted floor area per degree day, performance year:
13.66 Btu / GSF / Degree-Day (°F)

Documentation (e.g. spreadsheet or utility records) to support the performance year energy consumption figures reported above:

A brief description of the institution's initiatives to shift individual attitudes and practices in regard to energy efficiency (e.g. outreach and education efforts):

The first initiative, Energy GPA, is a program that provides students in University-owned student neighborhood houses with a grade of their monthly energy use. Monthly "report cards" include electricity and gas usage and a monthly tip for energy savings. Grades are determined by comparing a house's usage against an average of that house's previous three years of energy-use data. With over 400 houses in our student neighborhood, the Energy GPA program will be a key way in which we engage students in lowering UD's overall carbon footprint.

The second initiative utilizes Housing and Residence Life's "PATH Point System," which provides students with the most points priority in housing placements, by providing students with the opportunity to watch educational videos on lifestyle changes to reduce energy usage and live more sustainably.

A brief description of energy use standards and controls employed by the institution (e.g. building temperature standards, occupancy and vacancy sensors):

Some buildings are scheduled to be fully conditioned only during occupied periods (ex. 6 AM to 11 PM), depending on use patterns and function. We are currently identifying buildings that do not have nighttime setbacks and occupancy ventilation, and implementing VAV box scheduling and controls based on occupancy sensors. During the summer, one residence hall building is currently closed and only minimally conditioned to prevent mold and humidity damage.

A brief description of Light Emitting Diode (LED) lighting and other energy-efficient lighting strategies employed by the institution:

A major focus of the university’s green revolving fund has been to retire florescent lights in favor of LED replacement lamps. These projects have shown that it is financially prudent to replace even relatively efficient T8 lamps. Students and staff are systematically identifying building spaces where it is profitable to replace the florescent lamps and using GRF money or other funding to complete these projects. In addition to transitioning to LEDs, occupancy sensors have been installed in order to turn lights off during unoccupied periods and save energy. For several years, the university has also been replacing its high pressure sodium exterior lighting and gym lighting with LED lamps.

A brief description of passive solar heating, geothermal systems, and related strategies employed by the institution:


A brief description of co-generation employed by the institution, e.g. combined heat and power (CHP):

The solar building at the Energy Experience Center has a ground source heat pump system that is able to heat and cool the building by exchanging heat with the ground using a series of tubes placed in vertical holes in the ground.

A brief description of the institution's initiatives to replace energy-consuming appliances, equipment and systems with high efficiency alternatives (e.g. building re-commissioning or retrofit programs):

The university is an active participant in DP&L's rebate programs, especially the retrocommissioning program, which has saved over a million kWh in campus buildings since 2017. Student groups like the Campus Energy Team also participate in projects like these through the Green Revolving Fund.

The website URL where information about the programs or initiatives is available:
Additional documentation to support the submission:

Since last year's report, we have improved our energy consumption record keeping and have updated our baseline year with new data to reflect this. We have a different way of calculating building square footage for this dataset so GSF values are slightly different than those reported in IC-2. We are still not yet confident in our energy data for our student neighborhood so we have excluded it from the report again this year.

The information presented here is self-reported. While AASHE staff review portions of all STARS reports and institutions are welcome to seek additional forms of review, the data in STARS reports are not verified by AASHE. If you believe any of this information is erroneous or inconsistent with credit criteria, please review the process for inquiring about the information reported by an institution or simply email your inquiry to stars@aashe.org.