The CBECS classifies buildings according to their “principal building activity (PBA)” at the time when the survey is completed. The PBA is defined as the primary business, commerce, or function within each building. For projects with multiple activity classifications, the activity that occupies the most floorspace ultimately defines the usage type category. Buildings are also classified into more specific sub-categories of activities, which are reflected in the “National Office Activity Breakdown” chart below.

The CBECS website specifically defines the office principal building activity as “Buildings used for general office space, professional office, or administrative offices. Medical offices are included here if they do not use any type of diagnostic medical equipment (if they do, they are categorized as an outpatient health care building).”

More information on building activity definitions can be found on the CBECS website located here:

http://www.eia.gov/emeu/cbecs/building_types.html#Office

IPCCR Disaggregated EUI

CBECS: OFFICE

NATIONAL AVERAGE EUI SAM

PLE

SIZE

976

IPC Climate Region Average EUI SA

MPL

E SI

ZE 4

10

12 billion ft2

NATIONAL SQUARE FOOTAGE

SAM

PLE

SIZE

976

2.6 trillion kBTU

NATIONAL ENERGY CONSUMPTION

SAM

PLE

SIZE

976

EUI 37The Terry Thomas

Seattle, Washington

EUI 64.5BUILDING 0140

MetroSample Lower Quartile

EUI 74.3EPA Region 8 Headquarters

Denver, Colorado

EUI 73.3Golden Hill Office Center

Lakewood, Colorado

EUI 75.1Building 0040

Metro

EUI 77.2BUILDING 0032

MetroSample Median Quartile

EUI 85.4BUILDING 0148

MetroSample Upper Quartile

EUI102.7

48%

4%

4%2%

20%4%3%

6%

9%

SA

MP

LE S

IZE

41

0

53%

03%

15%

07%

17%

05%

adm

inistrative

bank /fin

ancial

g

over

nmen

t offic

e

med

ical

offic

e

mixe

d use office

other office

National Office Activity Breakdown

SAMPLE SIZE 976

NATURAL GAS ELECTRIC

IPCCR Utility Breakdown

49.9%

72.0%28.0%

50.1%

consumption percentage

cost percentage

total cost$23,026.83 | $58,205.13

cost/sq ft$0.49 | $1.23

SAMPLE SIZE 263

heating cooling ventillation water heating lighting cooking refrigeration office equipmentcomputermiscellaneous

37 out of 41009%, 50% OR MORE DAYLIT

IPCCR % of Buildings with Renovations

SAMPLE SIZE 410

HVA

C S

YSTE

MS

16% 15% 10% 07%

LIG

HTI

NG

WIN

DO

WS

INSU

LATI

ON

created by:

sponsored by:

VAV 34% EUI 100.8

CAV +

OTH

ER 5

5.5%

EUI

88.4

Heat Pump10.5% EUI 91.2

IPCCR EUI by HVAC Characteristics

IPCCR EUI By Vintage / End Use

SAMPLE SIZE 401

SAMPLE SIZE 382

HEAT PUMP CHARACTERISTICSSAMPLE SIZE 40SAMPLE SIZE 130

VAV CHARACTERISTICSSAMPLE SIZE 212CAV + OTHER CHARACTERISTICS

0 - 10,000 SF

33% 39% 27%

100,000 + SF10,000 - 100,000 SF

IPCCR EUI by Building Size

SAMPLE SIZE 410

EUI88.9

EUI103.8

EUI118.4

IPCCR EUI by Building Shape

SAMPLE SIZE 360

heating cooling ventillation water heating lighting cooking refrigeration office equipmentcomputermiscellaneous

HEATING

EUI

COOLING OFFICE EQUIPMENT

COMPUTER MISCELLANEOUSWATERHEATING

LIGHTING COOLING REFRIGERATIONVENTILATION

PRE 19201920-19451946-19691970-19891990-2003MEDIANeui 85.8

eui 81.8eui 92.7

eui 98.3eui 92.4

eui 77.9

5

10

15

20

25

30

35

40

45

50

55

60

5

10

15

20

25

OtherEUI 97.4

VAV Packaged/Individual

EUI 100.8

District EUI 197

Cen

tral E

UI 1

43

Packaged/Individual EUI 88.4

Other EUI 70.2

DistrictEUI 205.4

Cen

tral E

UI 9

8.7

54%

12%

06%

02%02%

01%01%

323.2

123.7

115.1

107.5

102.299.5

88.284.983.8

75.9

65.5

EUI

0

04%05%

SAMPLE SIZE 382BUILDINGS WITH EMSWITH EMS

26% 51% 23%

WITHOUT EMS UNKNOWN

100.0EUI

78.0EUI

104.3EUI

Water Loop EUI 91.2

Ground Source EUI 41.0

Air S

ourc

e EU

I 69.7