Energy Benchmarking 101

© 2013

Annual energy used by a building relative to its size:

kWh therms gallons cu. ft.

kBtu sf

Source

Site

Energy Source Multiplier

Electricity (grid) 3.340

Electricity (onsite renewable) 1.000

Natural Gas 1.047

Fuel Oil 1.010

Propane 1.010

Electricity Generation

Energy Source (EIA.gov)

Efficiency

Coal 33%

Petroleum 32%

Natural Gas 39%

Nuclear 33%

CBECS

•!Last data set collected in 2003 •!CBECS 2012 data collection starts in April 2013 •!Provides site and source EUI by building type •!Snapshot in time, does not set reduction targets

Energy Independence & Security Act of 2007 •!H.R. 6 page 121 – Federal Building Energy Efficiency Performance Standard •!In 2010, reduce fossil-fuel based energy consumption by 55% compared to

CBECS 2003 •!By 2030, reduce fossil-fuel energy based consumption by 100% compared to

CBECS 2003

2030 Challenge •!Immediate 60% reduction in fossil-fuel based energy, with 100% reduction by

2030 •!Underpinned by both ENERGY STAR Target Finder program, and CBECS 2003

data •!Progress measured by site EUI •!Focus on “carbon neutrality”, not “net zero energy”

0

10

20

30

40

50

60

70

80

90

100

2010 2015 2020 2025 2030

Zero Energy Building

AIA’s 2030 Commitment

CBECS National Average EUI (K122003) = 83.1

kBtu

/sf/

yr

Energy Independence and Security Act of 2007

Tod

ay

ENERGY STAR •!Rating earned based on measured (or modeled) performance compared to

similar buildings in same climate zone •!Limited number of building types are eligible (K12 schools are eligible!) •!Ratings based on source EUI – so fuel type plays a bigger role in this system

LEED for Schools •!Whole building rating system focused on school concerns •!Points awarded for design phase energy performance predictions •!Energy assessed based on predicted decrease from theoretical baseline •!Option exists to recertify over time using actual performance data (LEED for

Existing Buildings: Operations and Maintenance)

CHPS-VA •!Whole building rating system focused on school concerns •!Points awarded for design phase energy performance predictions •!Energy assessed based on predicted decrease from theoretical baseline •!Energy Performance Rating Goal of 75+ using Target Finder, strive to meet site EUI

target •!Option to participate in CHPS Operations Report Card program (not recertification)

LEED for Schools (v3) 5%-48% better than ASHRAE 90.1-2007

LEED for Schools (v4) 3%-50% better than ASHRAE 90.1-2010

CHPS-VA (2011) 15%-50% better than ASHRAE 90.1-2007

0

10

20

30

40

50

60

70

80

90

100

2010 2015 2020 2025 2030

Zero Energy Building

Zero Energy Capable

AIA’s 2030 Commitment

National Average EUI (K12) = 83.1

kBtu

/sf/

yr

Energy Independence and Security Act of 2007

Tod

ay

Virginia sample average = 67.67

North Carolina sample average = 70.72

Virginia sample average = 70.65

North Carolina sample average = 67.25

Virginia sample average = 66.83 North Carolina sample average = 67.17

Virginia sample average = 67.10

North Carolina sample average = 65.68

CBECS National average = 83.10

Zero Energy Capable

es ms hs district

VIRGINIA

51.55 - 87.87 39.16 - 100.57 47.35 - 115.84 49.01 - 93.68

NORTH CAROLINA

53.50 - 95.89 55.10 - 73.20 51.00 - 82.97 53.50 - 71.63

0

10

20

30

40

50

60

70

80

90

100

2010 2015 2020 2025 2030

Zero Energy Building

Zero Energy Capable

AIA’s 2030 Commitment

National Average EUI (K12) = 83.1

Hillandale ES = 29.75

kBtu

/sf/

yr

Energy Independence and Security Act of 2007

Tod

ay

80,713 square feet

35 classrooms 722 student capacity

800 student core

First buildings to achieve LEED Certification in

Henderson County

Recognized by the EPA’s ENERGY

STAR program for design and operations

38.0 35.1 29.8 33.7 31.9 30.4

0.0

20.0

40.0

60.0

80.0

100.0

120.0

2009-2010 2010-2011 2011-2012

Hillandale ES Mills River ES

National Average EUI (K12) = 83.1

North Carolina (Study) Average EUI (K12) = 65.7

!!Within 15o of east-west axis !!Classrooms on perimeter !!Light shelves at all classrooms !!Tubular daylighting devices !!Ease of circulation and visibility

DAYLIGHT

OVERHANG

SHADE

AMPLE INSULATION

http://newbuildings.org