Overall Rating Silver - expired
Overall Score 51.85
Liaison Karen Eckert, Ph.D.
Submission Date Nov. 30, 2015
Executive Letter Download

STARS v2.0

Principia College
OP-8: Building Energy Consumption

Status Score Responsible Party
Complete 2.83 / 6.00 Dean Kuehnel
Supervisor of Engineering
"---" indicates that no data was submitted for this field

Total building energy consumption, all sources (transportation fuels excluded):
Performance Year Baseline Year
Total building energy consumption 34,833 MMBtu 34,689.70 MMBtu

Purchased electricity and steam:
Performance Year Baseline Year
Grid-purchased electricity 34,833 MMBtu 34,689.70 MMBtu
District steam/hot water 0 MMBtu 0 MMBtu

Gross floor area of building space::
Performance Year Baseline Year
Gross floor area 1,077,376 Gross Square Feet 1,077,376 Gross Square Feet

Floor area of energy intensive space, performance year::
Floor Area
Laboratory space 49,003 Square Feet
Healthcare space 11,092 Square Feet
Other energy intensive space

Degree days, performance year (base 65 °F)::
Degree days (see help icon above)
Heating degree days 5,330
Cooling degree days 1,522

Source-site ratios::
Source-Site Ratio (see help icon above)
Grid-purchased electricity 3.14
District steam/hot water 1.20

Start and end dates of the performance year and baseline year (or 3-year periods)::
Start Date End Date
Performance Year Jan. 1, 2014 Dec. 31, 2014
Baseline Year Jan. 1, 2011 Dec. 31, 2011

A brief description of when and why the building energy consumption baseline was adopted:

A brief description of any building temperature standards employed by the institution:

The institution's building temperature standards are maintained by the Department of Facilities at 68-72'F (heating) and 74-78'F (cooling).

A brief description of any light emitting diode (LED) lighting employed by the institution:

The College has established a policy of replacing lighting, as needed, with LED alternatives with an aim to achieve greater color-balanced brightness, as well as lower energy use and reduced maintenance. This has happened already in several cases: (i) School of Government (main floor hallway), (ii) Student Center (track lighting, student government area), (iii) Dining Hall (ceiling lights), (iv) Science Center (120 13W LEDs replaced 90W floods), (v) Cox Auditorium (aisle lighting replaced).

A brief description of any occupancy and/or vacancy sensors employed by the institution:

Sensor have been placed in the newer buildings - e.g., Hay Field house (bathrooms, locker rooms), Crafton Athletic Center (locker rooms), Science Center (bathrooms), Facilities Department (engineer shop, main break room, men's bathrooms). In the athletic centers the lights as well as the VAV are sensor-controlled, with the VAV moving from 'unoccupied' (standby mode) to 'occupied' with CFM metrics adjusting accordingly.

A brief description of any passive solar heating employed by the institution:


A brief description of any ground-source heat pumps employed by the institution:


A brief description of any cogeneration technologies employed by the institution:


A brief description of any building recommissioning or retrofit program employed by the institution:

Principia College is a National Historic Landmark (1993) featured on the National Register of Historic Places primarily for its unique Maybeck architecture. As such, the college takes great care when recommissioning or retrofitting to conserve existing buildings while maintaining a high standard of energy efficiency in building materials, energy use, and furnishings. Every possible step is taken to recycle or repurpose all scrap materials.

A brief description of any energy metering and management systems employed by the institution:

The entire campus is managed via VAV [variable air volume] heat/cooling systems controlled by Andover software. The objective is both consistency and efficiency across the landscape.

A brief description of the institution's program to replace energy-consuming appliances, equipment and systems with high efficiency alternatives:

The college has a long-standing policy of purchasing only Energy Star rated appliances, and seeks to upgrade efficiency with each purchasing opportunity.

A brief description of any energy-efficient landscape design initiatives employed by the institution:

The college seeks to maximize the use of native species in its landscaping, minimize chemical application (see IPM described in OP-10), and minimize the use of irrigation (which is directed only at the Chapel Green and athletic fields). Students have planted native gardens at residence halls, made recommendations for the implementation of rain gardens, refurbished a community garden with an apiary and native plantings, and incorporated permaculture design principles into several campus projects. The campus is tree-sense, and the trees provide wind breaks and temperature moderation.

A brief description of any vending machine sensors, lightless machines, or LED-lit machines employed by the institution:

All public vending machines on campus are installed with sensors.

A brief description of other energy conservation and efficiency initiatives employed by the institution:

In addition to the attention paid to heating/cooling, lighting, metering, etc. described above, every student residence hall has an elected EcoHead as part of its governing board, and these students work hard to educate their peers about energy conservation. The Facilities Department has several means of outreach, both written and electronic, to educate the campus about energy conservation.

The website URL where information about the institution’s energy conservation and efficiency initiatives is available:

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.