Overall Rating	Silver
Overall Score	53.91
Liaison	Tom Hartzell
Submission Date	Dec. 21, 2022

STARS v2.2

Calvin University
OP-5: Building Energy Efficiency

Status	Score	Responsible Party
	2.59 / 6.00	Nick Thompson Associate Director Building Services Physical Plant

"---" indicates that no data was submitted for this field

Part 1. Site energy use per unit of floor area

Performance year energy consumption

Electricity use, performance year (report kilowatt-hours):

	kWh	MMBtu
Imported electricity	20,073,310 Kilowatt-hours	68,490.13 MMBtu
Electricity from on-site, non-combustion facilities/devices (e.g., renewable energy systems)	0 Kilowatt-hours	0 MMBtu

Stationary fuels and thermal energy, performance year (report MMBtu):

	MMBtu
Stationary fuels used on-site to generate electricity and/or thermal energy	180,935 MMBtu
Imported steam, hot water, and/or chilled water	0 MMBtu

Total site energy consumption, performance year:

249,425.13 MMBtu

Performance year building space

Gross floor area of building space, performance year:

2,197,026 Gross square feet

Floor area of energy intensive space, performance year:

	Floor area
Laboratory space	57,530 Square feet
Healthcare space	3,452 Square feet
Other energy intensive space	85,557 Square feet

EUI-adjusted floor area, performance year:

2,404,547 Gross square feet

Performance year heating and cooling degree days

Degree days, performance year:

	Degree days
Heating degree days	6,301 Degree-Days (°F)
Cooling degree days	883 Degree-Days (°F)

Total degree days, performance year:

7,184 Degree-Days (°F)

Performance period

Start and end dates of the performance year (or 3-year period):

	Start date	End date
Performance period	May 31, 2021	June 1, 2022

Metric used in scoring for Part 1

Total site energy consumption per unit of EUI-adjusted floor area per degree day, performance year:

14.44 Btu / GSF / Degree-Day (°F)

Part 2. Reduction in source energy use per unit of floor area

Baseline year energy consumption

STARS 2.2 requires electricity data in kilowatt-hours (kWh). If a baseline has already been established in a previous version of STARS and the institution wishes to continue using it, the electricity data must be re-entered in kWh. To convert existing electricity figures from MMBtu to kWh, simply multiply by 293.07107 MMBtu/kWh.

Electricity use, baseline year (report kWh):

	kWh	MMBtu
Imported electricity	25,073,310 Kilowatt-hours	85,550.13 MMBtu
Electricity from on-site, non-combustion facilities/devices (e.g., renewable energy systems)	0 Kilowatt-hours	0 MMBtu

Stationary fuels and thermal energy, baseline year (report MMBtu):

	MMBtu
Stationary fuels used on-site to generate electricity and/or thermal energy	48,759.36 MMBtu
Imported steam, hot water, and/or chilled water	0 MMBtu

Total site energy consumption, baseline year:

134,309.49 MMBtu

Baseline year building space

Gross floor area of building space, baseline year:

2,210,347 Gross square feet

Baseline period

Start and end dates of the baseline year (or 3-year period):

	Start date	End date
Baseline period	Jan. 1, 2009	Dec. 31, 2009

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

The baseline year was chosen as it was after any major renovations and building construction. The baseline year is recent enough to capture reliable data from the past and use that to see how much progress we have made with sustainability efforts.

The 2009 (baseline) stationary fuels used on site (188,277MMbtu) was indicated as being in the records. (per Jack Philips' email, 3.18.20). - BRH

Source energy

Source-site ratio for imported electricity:

Total energy consumption per unit of floor area:

	Site energy	Source energy
Performance year	0.11 MMBtu per square foot	0.18 MMBtu per square foot
Baseline year	0.06 MMBtu per square foot	0.14 MMBtu per square foot

Metric used in scoring for Part 2

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

Optional Fields

Documentation to support the performance year energy consumption figures reported above:

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A brief description of the institution's initiatives to shift individual attitudes and practices in regard to energy efficiency:

See Kill-a-Watt in credit EN-1.

A brief description of energy use standards and controls employed by the institution:

Most areas are heated to 70 degrees F and cooled to 72 degrees F.

(10.25.22) : HDD and CDD were calculated using for FY 2021-22: https://portfoliomanager.energystar.gov/pm/degreeDaysCalculator
which uses the base of 65 degrees-F as stated for Part 2.

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

The campus is trying to convert more and more spaces to LED. Many large spaces and spaces with daily usage have already been converted to LED lighting. All the street lights have been converted to LED.

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

n/a

A brief description of co-generation employed by the institution:

n/a

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

Any building remodeling projects would be looked at as a way to evaluate the current energy consumption items and challenge if there are better alternatives available.

Website URL where information about the institution’s energy conservation and efficiency program is available:

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Additional documentation to support the submission:

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Data source(s) and notes about the submission:

The grid purchased electricity comes from 19,000,000+ kWh for Calvin's main bill and ~1,000,000 kWh for the remaining properties in the institutional boundary.
Conversion from kWh to MMBtu was performed with information from the U.S. Energy Information Administration (eia): https://www.eia.gov/energyexplained/index.php?page=about_energy_conversion_calculator
Solar panel power (on-site renewable) comes from Chuck Holwerda.
(JW 1.22.19)

For the performance year energy consumption I placed our imported electricity, steam, and chilled water under electricity because it is all sourced from electricity and we don't have it separated it out. (KM 1.18.20)

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.