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Commercial Buildings Energy Consumption Survey (CBECS)

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Table E3. Electricity consumption (Btu) by end use, 2012

Released: May 2016

Total electricity consumption (trillion Btu)
  Total Space
heat-
ing		 Cool-
ing		 Venti-
lation		 Water
heat-
ing		 Light-
ing		 Cook-
ing		 Refrig-
eration		 Office
equip-
ment		 Com-
puting		 Other
All buildings 4,241 85 633 668 22 724 93 670 172 405 769
Building floorspace (square feet)                      
1,001 to 5,000 445 12 50 45 3 59 28 131 21 33 63
5,001 to 10,000 386 8 45 48 3 58 16 93 17 33 66
10,001 to 25,000 543 15 67 79 4 92 13 92 28 50 103
25,001 to 50,000 508 12 74 84 3 97 4 68 21 46 98
50,001 to 100,000 654 14 102 108 4 110 8 103 27 60 117
100,001 to 200,000 647 10 94 116 2 119 7 92 21 73 113
200,001 to 500,000 615 8 116 106 3 109 8 68 19 62 117
Over 500,000 442 5 84 82 2 80 9 23 19 48 91
Principal building activity                      
Education 458 10 90 68 3 78 4 40 21 78 66
Food sales 208 2 6 12 0 16 10 147 2 2 12
Food service 279 5 30 31 3 19 46 114 7 4 21
Health care 365 4 69 82 1 61 8 19 17 34 70
Inpatient 251 2 58 46 1 40 7 14 12 21 50
Outpatient 114 2 11 37 0 21 1 4 5 13 20
Lodging 304 8 39 49 3 40 10 33 43 6 74
Mercantile 705 13 91 121 7 140 6 191 18 23 94
Retail (other than mall) 281 5 40 47 1 72 2 53 7 11 44
Enclosed and strip malls 424 8 52 75 7 68 4 139 11 12 50
Office 865 19 116 214 2 148 2 28 37 167 132
Public assembly 275 9 82 24 0 35 4 25 7 16 73
Public order and safety 73 1 15 5 1 15 1 3 3 8 20
Religious worship 81 3 15 13 0 9 1 4 3 3 28
Service 127 3 16 14 0 37 0 5 4 8 39
Warehouse and storage 284 4 34 13 1 85 0 47 6 16 78
Other 191 3 26 16 0 37 Q 15 2 40 51
Vacant 26 1 2 4 0 5 Q 1 0 1 12
Year constructed                      
Before 1920 109 2 10 19 0 20 3 15 4 10 25
1920 to 1945 219 3 32 35 1 38 4 33 9 23 42
1946 to 1959 290 6 42 48 2 50 6 41 12 25 58
1960 to 1969 502 11 68 73 3 90 11 70 23 56 96
1970 to 1979 582 11 79 100 3 98 15 90 25 58 102
1980 to 1989 797 16 140 130 4 132 14 115 31 77 137
1990 to 1999 727 15 112 108 4 121 18 128 27 65 127
2000 to 2003 380 6 57 61 2 67 8 57 14 40 68
2004 to 2007 330 6 48 47 1 57 5 66 15 25 60
2008 to 2012 304 6 44 49 1 50 8 54 12 26 54
Census region and division                      
Northeast 752 17 76 134 3 134 15 121 27 81 143
New England 172 5 13 27 1 29 4 34 7 16 37
Middle Atlantic 579 12 63 107 2 105 11 87 21 65 107
Midwest 851 25 96 141 4 155 23 128 33 79 167
East North Central 595 16 66 100 2 109 15 91 22 55 118
West North Central 256 9 30 41 2 46 8 37 11 24 49
South 1,809 28 369 259 11 295 38 278 72 152 307
South Atlantic 978 15 197 140 7 154 18 154 42 89 162
East South Central 241 5 39 37 1 40 7 42 11 18 41
West South Central 590 8 133 82 3 101 13 82 19 45 103
West 829 14 92 134 4 139 18 143 40 93 152
Mountain 229 5 30 39 1 38 5 35 13 22 41
Pacific 600 9 62 95 3 101 13 109 27 71 111
Climate region1                      
Very cold/Cold 1,430 44 131 246 6 257 32 237 58 138 280
Mixed-humid 1,418 31 216 221 8 243 35 217 61 138 249
Mixed-dry/Hot-dry 520 3 77 76 2 87 11 88 23 60 94
Hot-humid 752 5 202 103 5 117 14 109 25 53 120
Marine 120 2 7 22 1 21 2 18 5 17 26
Number of floors                      
One 1,861 40 260 243 13 324 55 434 61 127 304
Two 884 21 124 139 4 154 12 132 36 101 160
Three 373 8 55 64 1 63 8 38 18 43 75
Four to nine 788 12 134 154 2 127 13 50 38 94 163
Ten or more 335 4 59 68 1 55 5 16 19 41 67
Elevators and escalators
(more than one may apply)		                      
Any elevators 1,840 30 310 349 6 304 27 136 83 237 357
Number of elevators                      
One 501 11 72 95 2 88 6 52 24 58 94
Two to five 759 13 123 140 3 122 10 51 32 120 147
Six or more 580 6 116 115 1 94 12 33 28 59 116
Any escalators 226 4 40 43 1 42 4 16 12 17 47
Number of workers (main shift)                      
Fewer than 5 456 13 54 45 3 78 11 93 22 24 112
5 to 9 381 10 51 49 2 61 16 79 17 24 71
10 to 19 451 11 57 60 3 71 21 99 22 32 76
20 to 49 750 16 101 112 5 126 17 145 30 73 124
50 to 99 730 15 117 119 4 128 9 118 27 75 120
100 to 249 632 9 100 110 3 116 6 86 21 68 113
250 or more 840 11 152 172 3 143 13 50 34 109 153
Weekly operating hours                      
Fewer than 40 119 5 20 8 1 17 2 15 6 12 33
40 to 48 527 13 87 74 2 99 3 40 27 82 100
49 to 60 814 21 126 138 4 150 6 64 33 121 152
61 to 84 850 17 126 148 7 143 14 173 25 65 131
85 to 167 682 11 85 92 2 106 34 212 13 27 100
Open continuously 1,248 17 189 209 5 209 34 166 67 97 254
Ownership and occupancy                      
Nongovernment owned 3,370 68 472 530 18 571 81 602 136 293 600
Owner occupied 1,554 32 231 222 6 262 43 267 72 117 301
Leased to tenant(s) 1,358 28 177 230 10 229 30 268 48 122 217
Owner occupied and leased 452 7 63 78 2 79 7 67 16 54 79
Unoccupied 6 Q 0 0 Q Q Q Q Q Q 4
Government owned 871 17 161 139 4 153 13 68 36 112 168
Federal 77 1 13 17 0 15 1 3 2 8 18
State 275 5 35 55 1 50 4 23 13 34 55
Local 518 11 113 66 3 87 8 43 21 71 95
Party responsible for operation
and maintenance of energy
systems		                      
Building owner 3,512 71 539 561 17 606 73 476 149 357 662
Business owner or tenant 620 11 76 90 5 101 16 176 18 39 88
Property management 63 1 10 12 0 9 2 8 3 7 11
Other 46 1 8 5 Q 7 2 10 2 2 8
Provider of direct input on energy-
related equipment purchases		                      
Building owner 3,621 73 552 577 18 625 74 505 153 365 679
Business owner or tenant 485 9 61 70 4 78 15 133 14 32 69
Property management 40 1 6 8 0 7 1 5 2 3 7
Other 94 1 14 14 0 14 3 27 3 5 14
Number of establishments                      
One 2,651 55 395 387 12 455 73 405 120 248 501
2 to 5 849 16 122 143 4 145 14 147 29 71 157
6 to 10 240 4 33 45 2 37 2 47 8 28 34
11 to 20 234 5 36 46 2 38 2 45 7 19 33
More than 20 260 4 46 47 2 48 2 26 7 39 38
Currently unoccupied 6 Q 0 0 Q 0 Q Q Q Q 5
Predominant exterior wall material                      
Brick, stone, or stucco 2,035 43 309 335 11 330 52 292 92 207 363
Concrete (block or poured) 1,101 18 171 163 7 186 20 232 39 81 183
Concrete panels 411 6 56 69 1 77 5 47 18 50 83
Siding or shingles 244 8 28 35 1 39 10 46 11 19 46
Metal panels 270 7 43 32 1 64 2 31 7 22 62
Window glass 107 2 16 22 0 17 1 7 3 21 18
Other 47 1 6 7 0 7 1 Q 1 3 9
No one major type 26 0 3 5 0 5 Q 4 1 2 6
Predominant roof material                      
Metal surfacing 576 14 91 65 3 115 11 98 21 45 113
Synthetic or rubber 1,440 29 203 245 6 243 29 228 55 144 258
Built-up 1,150 19 184 199 6 198 26 163 42 118 196
Slate or tile shingles 200 3 26 30 1 30 5 34 12 19 41
Wooden materials (including
shingles)		 47 0 6 6 0 7 2 12 2 3 8
Asphalt, fiberglass, or
other shingles		 670 17 95 99 4 107 19 113 35 56 124
Concrete 102 1 20 16 Q 16 1 11 4 16 18
Other 36 0 6 5 Q 5 Q 9 1 2 7
No one major type 18 0 3 3 Q 4 Q Q 1 2 4
Roof characteristics                      
Roof tilt                      
Flat 2,728 49 428 464 13 472 57 382 102 276 484
Shallow pitch 1,017 21 134 136 6 177 21 213 41 87 182
Steeper pitch 495 14 71 69 3 75 15 75 29 42 103
Cool roof 1,108 18 170 183 6 186 21 179 40 113 190
Renovations in buildings
constructed before 2008
(more than one may apply)		                      
Any type of renovation 2,212 45 332 368 11 367 49 320 89 229 401
Addition or annex 698 14 126 113 4 118 13 84 32 59 136
Reduction in floorspace 121 1 20 23 0 22 2 18 4 9 21
Roof replacement 1,124 22 171 194 6 189 27 145 44 118 208
Exterior wall replacement 240 5 39 38 1 37 5 35 8 28 42
Interior wall reconfiguration 1,216 24 186 219 6 199 21 143 48 155 215
Window replacement 601 12 94 100 3 97 15 64 30 73 111
HVAC equipment upgrade 1,477 29 234 252 7 245 30 198 59 157 266
Lighting upgrade 1,398 27 211 235 6 227 34 208 56 147 247
Electrical upgrade 903 18 143 149 4 144 20 121 37 100 167
Plumbing system upgrade 758 15 114 129 4 116 20 99 35 86 139
Insulation upgrade 429 9 64 66 2 63 10 69 19 52 76
Fire, safety, or security upgrade 963 19 160 164 4 150 24 118 38 113 172
Structural upgrade 235 4 40 35 1 35 4 30 11 29 46
Other 44 1 7 9 0 8 Q 3 2 6 8
No renovations 1,725 34 256 251 10 307 36 295 71 150 314
Buildings constructed 2008 or later 304 6 44 49 1 50 8 54 12 26 54
Energy sources
(more than one may apply)		                      
Electricity 4,241 85 633 668 22 724 93 670 172 405 769
Natural gas 3,082 51 458 498 14 514 69 523 127 283 545
Fuel oil 1,303 20 224 226 5 222 22 116 51 157 259
District heat 353 3 25 83 1 68 6 23 19 40 84
District chilled water 292 3 12 68 1 58 5 18 16 40 71
Propane 376 11 48 47 2 64 11 78 17 23 75
Other 170 3 26 31 1 30 3 26 5 16 31
Space-heating energy sources                      
Electricity 2,642 85 415 408 17 432 57 435 106 246 440
Electricity main 1,499 54 257 216 12 237 32 236 64 149 243
Electricity secondary 1,142 31 158 192 5 195 25 199 42 98 197
Other excluding electricity 1,445 N 181 249 4 261 34 212 62 151 292
Buildings without heating 154 N 36 11 1 31 2 23 4 8 37
Primary space-heating
energy source		                      
Electricity 1,499 54 257 216 12 237 32 236 64 149 243
Natural gas 2,085 23 300 339 8 360 47 361 78 197 372
Fuel oil 81 2 9 12 0 17 1 9 4 8 19
District heat 345 3 24 82 1 67 6 22 18 39 83
Propane 61 3 5 6 0 9 Q 17 2 3 11
Other 16 Q 1 2 0 4 Q 2 Q 1 4
Cooling energy sources                      
Electricity 3,954 82 633 619 21 659 89 637 157 373 685
Other excluding electricity 193 1 N 46 1 40 3 13 12 29 48
Buildings without cooling 94 1 N 3 0 24 2 20 3 4 36
Water-heating energy sources                      
Electricity 2,215 54 341 339 22 380 41 378 74 222 365
Other excluding electricity 1,912 29 277 319 N 316 52 286 95 175 363
Buildings without water heating 114 2 15 10 N 28 Q 5 4 9 41
Cooking energy sources                      
Electricity 1,547 32 246 231 9 219 93 312 56 121 229
Other excluding electricity 842 11 134 133 5 120 N 216 38 50 135
Buildings without cooking 1,851 41 254 304 8 384 N 142 78 235 405
Energy end uses
(more than one may apply)		                      
Buildings with space heating 4,086 85 596 657 21 693 91 647 168 397 732
Buildings with cooling 4,147 83 633 665 22 699 92 650 169 401 733
Buildings with water heating 4,127 83 618 658 22 696 93 664 168 396 728
Buildings with cooking 2,390 43 379 364 14 340 93 528 94 171 364
Buildings with manufacturing 228 4 33 28 1 49 3 32 5 15 57
Buildings with electricity
generation		 1,673 26 272 287 7 274 30 211 65 195 306
Percent of floorspace heated                      
Not heated 154 N 36 11 1 31 2 23 4 8 37
1 to 50 334 3 38 38 1 63 4 63 11 39 74
51 to 99 798 13 126 129 5 131 16 158 29 60 131
100 2,955 69 432 491 15 499 71 426 127 298 527
Percent of floorspace cooled                      
Not cooled 94 1 N 3 0 24 2 20 3 4 36
1 to 50 522 11 42 65 2 122 6 82 19 40 132
51 to 99 1,301 23 187 214 7 206 28 231 49 138 216
100 2,324 48 403 385 12 370 58 336 102 224 385
Percent lit when open                      
Zero 3 Q Q Q Q Q Q Q Q Q 3
1 to 50 388 10 54 61 2 50 6 49 23 27 107
51 to 99 1,793 36 265 295 11 284 39 307 72 175 309
100 2,045 39 313 311 9 387 49 314 77 203 343
Building never open/electricity
not used		 11 0 1 0 Q Q Q Q Q Q 7
Percent lit during off hours                      
Zero 791 21 117 116 4 126 12 102 32 94 167
1 to 50 2,675 54 415 432 16 463 56 418 106 251 464
51 to 100 562 8 70 88 2 98 20 105 23 47 100
Building always open with
no "off hours"		 213 2 31 32 1 36 5 44 11 13 38
Electricity not used N N N N N N N N N N N
Heating equipment
(more than one may apply)		                      
Heat pumps 613 15 113 86 5 97 11 87 34 62 104
Furnaces 363 11 47 53 2 58 12 68 18 32 63
Individual space heaters 926 29 122 148 5 166 19 132 42 84 179
District heat 350 3 25 83 1 67 6 22 19 40 84
Boilers 1,193 14 208 211 3 197 20 123 52 137 228
Packaged heating units 2,632 63 401 419 15 431 66 493 91 222 431
Other 131 4 9 18 1 15 4 62 2 3 13
Cooling equipment
(more than one may apply)		                      
Residential-type central air
conditioners		 636 14 93 75 4 108 13 144 29 47 110
Heat pumps 644 16 112 93 5 104 10 96 34 66 108
Individual air conditioners 546 14 88 81 4 89 13 70 34 47 106
District chilled water 292 3 12 68 1 58 5 18 16 40 71
Central chillers 1,120 14 215 210 3 179 18 80 43 147 210
Packaged air conditioning units 2,480 51 390 415 14 404 63 452 85 202 403
Swamp coolers 98 3 13 14 1 16 5 23 3 6 15
Other 32 Q 4 5 Q 5 Q 1 0 Q 5
Main equipment replaced since
1990 (more than one may apply)		                      
Heating 1,323 32 196 202 8 215 30 222 58 135 225
Cooling 1,519 33 245 235 9 243 33 233 68 158 262
Water-heating equipment                      
Centralized system 2,484 52 362 391 12 415 67 387 111 230 457
Distributed system 539 12 80 83 3 105 7 75 19 55 99
Combination of centralized and
distributed system		 1,104 19 176 185 7 176 19 202 38 111 172
Lighting equipment types
(more than one may apply)		                      
Incandescent 2,087 40 338 336 12 340 46 344 86 184 359
Standard fluorescent 4,085 80 609 650 21 693 89 649 166 394 735
Compact fluorescent 3,034 58 478 507 17 493 72 451 129 305 524
High-intensity discharge (HID) 1,303 22 220 215 7 229 22 190 49 112 237
Halogen 1,632 32 262 271 9 266 37 272 64 138 281
LED 1,416 24 229 248 7 220 28 251 52 117 241
Other 33 Q 5 5 Q 4 1 6 1 2 5
Refrigeration equipment
(more than one may apply)		                      
Any refrigeration 3,923 77 587 623 21 647 93 670 159 365 681
Walk-in units 2,069 30 314 309 12 283 77 547 73 130 292
Cases or cabinets 1,987 32 283 307 11 282 66 523 70 126 288
Large cold storage areas 334 3 38 37 1 42 8 145 7 13 41
Commercial ice makers 2,228 39 354 357 12 326 73 457 91 172 348
Residential-type or compact units 3,109 65 481 513 17 537 59 413 131 324 568
Vending machines 2,532 44 397 430 13 439 39 379 102 243 448
No refrigeration 318 8 45 46 1 77 Q N 13 40 88
Office equipment
(more than one may apply)		                      
Desktop computers 4,017 78 606 647 20 687 86 620 163 399 711
With flat screen monitors 3,977 77 601 641 20 678 85 614 162 398 700
With multiple monitors 1,785 29 280 321 8 298 26 212 69 233 309
Laptop computers 3,303 65 527 556 17 570 48 427 136 363 595
Dedicated servers 2,964 56 460 496 14 498 51 425 115 341 508
Laser printers 2,921 54 439 488 14 495 52 428 126 316 511
Inkjet printers 1,787 39 284 273 10 306 46 280 66 161 321
FAX machines 3,512 68 531 574 18 612 67 541 140 345 615
Photocopiers 3,099 59 491 528 14 540 43 387 132 344 561
Number of desktop computers                      
None 223 6 27 22 2 36 7 50 9 Q 58
1 to 4 700 16 82 82 4 106 41 189 30 22 128
5 to 9 456 10 60 62 3 77 11 106 20 27 80
10 to 19 441 11 58 69 2 79 6 79 17 41 78
20 to 49 716 14 114 118 5 131 8 117 29 55 126
50 to 99 408 10 68 73 2 77 4 45 16 41 72
100 to 249 545 8 75 99 3 101 6 48 25 81 101
250 or more 751 9 150 144 2 116 11 35 27 132 125
Number of laptop computers                      
None 938 20 105 112 5 154 45 243 36 43 174
1 to 4 930 23 136 125 6 165 19 181 40 60 175
5 to 9 431 8 65 73 3 81 6 70 16 32 76
10 to 19 445 11 77 79 3 75 6 63 16 38 78
20 to 49 525 9 72 96 3 91 6 56 25 74 95
50 to 99 292 5 54 53 1 51 4 22 11 37 55
100 to 249 308 4 49 58 1 50 3 17 12 61 53
250 or more 372 6 75 72 1 57 5 18 15 60 63
Number of dedicated servers                      
None 1,276 28 173 172 8 225 43 245 57 64 261
1 to 4 1,695 37 242 266 9 295 36 309 68 136 297
5 to 9 343 7 53 60 3 59 4 55 12 35 56
10 to 19 373 5 61 74 1 63 4 34 16 51 64
20 to 49 239 4 50 45 1 39 3 13 9 36 41
50 or more 313 3 55 51 1 42 4 14 10 83 50
Number of photocopiers                      
None 1,142 26 142 141 8 184 51 282 40 62 208
One 732 17 102 102 4 127 15 143 31 49 142
2 to 4 998 23 154 167 5 178 10 137 45 104 173
5 to 9 492 9 76 84 3 92 5 58 17 66 83
10 or more 876 10 158 174 2 143 12 49 39 124 163
Number of TVs or video displays                      
None 763 17 89 97 3 145 19 140 14 73 166
One 412 9 49 59 2 74 12 84 13 32 77
2 to 4 805 16 123 125 4 146 15 136 27 67 147
5 to 9 512 14 79 80 3 78 14 91 17 58 79
10 to 19 500 8 79 91 3 84 10 76 16 54 79
20 to 49 476 9 80 86 4 80 6 73 21 46 72
50 to 99 264 5 35 43 1 43 4 29 19 38 46
100 or more 508 6 99 87 1 73 14 41 46 37 104
Food preparation or serving areas
in non-food service buildings
(more than one may apply)		                      
Snack bar or concession stand 651 11 119 99 3 93 16 131 25 51 102
Fast food or small restaurant 765 9 118 122 5 113 14 202 29 43 110
Cafeteria or large restaurant 890 14 178 156 4 138 18 105 41 87 150
Commercial kitchen/
food preparation area		 996 17 177 157 5 142 23 200 47 64 165
Small kitchen area 693 13 127 106 3 103 18 108 33 54 127
Separate computer areas
(more than one may apply)		                      
Data center or server farm 814 12 159 141 1 124 9 46 31 151 138
Computer-based training room 1,022 16 185 177 4 174 14 123 39 123 168
Student or public computer center 692 13 125 114 4 111 12 79 36 78 120
HVAC conservation features
(more than one may apply)		                      
Economizer cycle 1,839 34 278 343 7 312 33 237 66 200 330
Regular HVAC maintenance 3,782 71 581 620 19 640 82 576 151 377 666
Building automation system (BAS)2 2,285 38 372 403 10 379 37 311 81 253 401
Window and interior lighting
features (more than one may
apply)		                      
Multipaned windows 3,174 68 464 516 17 524 75 515 131 307 556
Tinted window glass 2,451 45 398 408 14 416 45 364 95 240 426
Reflective window glass 1,025 19 169 174 5 163 15 154 41 118 167
External overhangs or awnings 1,874 34 276 296 12 295 50 381 74 158 299
Skylights or atriums 1,131 19 180 205 6 197 18 142 45 105 215
Light scheduling 1,847 32 287 318 10 284 35 327 67 183 302
Occupancy sensors 2,076 36 323 362 10 331 32 310 77 224 372
Multi-level lighting or dimming 929 17 145 161 5 132 21 182 39 72 154
Daylight harvesting 371 6 58 68 2 61 7 64 12 29 66
Demand responsive lighting 272 5 40 45 3 44 4 65 9 16 41
Building automation system (BAS) for lighting2 816 13 128 144 5 130 14 165 21 71 125
Equipment usage reduced when
building not in full use
(more than one may apply)		                      
Heating 3,046 68 470 502 17 509 58 480 118 296 528
Cooling 3,078 66 502 508 17 511 58 476 119 297 525
Lighting 3,880 80 584 620 21 664 83 595 156 376 699
Annual consumption
(kilowatthours)		                      
10,000 or less 14 1 2 1 0 3 0 1 1 1 6
10,001 to 50,000 170 6 21 20 1 34 2 13 10 18 46
50,001 to 100,000 213 7 27 27 1 41 4 24 11 21 48
100,001 to 500,000 964 23 119 130 6 158 30 209 45 78 165
500,001 to 1,000,000 562 13 83 88 4 88 20 89 28 56 94
1,000,001 to 5,000,000 1,293 23 188 223 6 225 22 239 43 107 217
Over 5,000,000 1,024 12 192 179 4 176 15 95 34 124 194
 
1These climate regions were created by the Building America program, sponsored by the U.S. Department of Energy’s Office of Energy Efficiency and Renewable Energy (EERE).
2In earlier CBECS publications, BAS was referred to as Energy Management and Control System (EMCS).
Q = Data withheld either because the Relative Standard Error (RSE) was greater than 50 percent or fewer than 20 buildings were sampled.
N = No cases in reporting sample.
Notes: • Because of rounding, data may not sum to totals. • See the Guide to the 2012 CBECS Detailed Tables or CBECS Terminology for definitions of terms used in these tables and/or comparison of differences with prior CBECS tables. Both references can be accessed from http://www.eia.gov/consumption/commercial/data/2012/ • Site electricity is the amount of electricity delivered to commercial builidngs. Primary electricity, which is not included in the Total of major fuelscategory, is site electricity plus the conversion losses in the generation, transmission, and distribution processes.• Statistics for the Energy end uses category represent total consumption in buildings that have the end use, not consumption specifically for that particular end use. • HVAC = Heating, ventilation, and air conditioning.
Source: U.S. Energy Information Administration, Office of Energy Consumption and Efficiency Statistics, Forms EIA-871A and E of the 2012 Commercial Buildings Energy Consumption Survey.