Table 3.25. Useful Thermal Output by Energy Source: Commercial Sector Combined Heat and Power, 2006 - 2016
(Billion Btus)

Period Coal Petroleum
Liquids
Petroleum
Coke
Natural
Gas
Other
Gas
Renewable
Sources
Other Total
Annual Totals
2006 22,186 2,092 172 19,370 0.22 9,359 6,242 59,422
2007 22,595 1,640 221 20,040 0 6,651 3,983 55,131
2008 22,991 1,822 177 20,183 0 8,863 6,054 60,091
2009 20,057 1,095 155 25,902 0 8,450 5,761 61,420
2010 19,216 845 216 29,791 13 7,917 5,333 63,330
2011 17,234 687 111 24,848 14 7,433 5,988 56,314
2012 13,992 523 229 27,922 0 7,970 6,426 57,063
2013 10,942 1,017 222 27,562 0 7,054 5,693 52,489
2014 11,081 820 327 26,876 0 7,610 5,123 51,837
2015 7,966 823 325 26,498 0 8,228 5,641 49,482
2016 8,313 924 140 57,356 0 11,017 5,381 83,131
Year 2014
January 1,344 446 32 4,690 0 711 440 7,663
February 1,353 174 28 2,043 0 553 311 4,461
March 1,265 99 33 1,834 0 621 438 4,290
April 850 13 31 1,732 0 543 424 3,593
May 772 15 16 1,833 0 659 425 3,720
June 831 10 0 1,876 0 686 402 3,805
July 930 13 5 2,052 0 677 415 4,090
August 722 9 41 2,264 0 671 450 4,155
September 637 6 38 2,118 0 630 464 3,893
October 571 7 29 2,162 0 618 455 3,841
November 862 14 36 2,095 0 590 441 4,038
December 945 14 39 2,177 0 652 459 4,286
Year 2015
January 985 114 46 2,395 0 716 441 4,698
February 996 420 44 2,222 0 630 399 4,711
March 823 58 39 2,231 0 675 490 4,316
April 541 37 26 1,838 0 682 490 3,614
May 506 41 3 1,989 0 686 445 3,670
June 610 29 0 2,060 0 646 472 3,817
July 645 34 0 2,380 0 772 472 4,302
August 565 36 32 2,265 0 681 487 4,066
September 499 7 42 2,346 0 725 487 4,106
October 491 8 38 2,181 0 669 476 3,864
November 575 25 31 2,239 0 650 499 4,020
December 729 14 26 2,352 0 694 483 4,298
Year 2016
January 918 158 34 5,063 0 979 434 7,585
February 902 102 30 4,502 0 918 399 6,851
March 884 28 26 4,469 0 927 477 6,812
April 556 63 4 4,332 0 915 462 6,332
May 429 51 0 4,348 0 868 470 6,165
June 577 54 2 4,938 0 869 430 6,870
July 579 105 19 5,772 0 937 480 7,891
August 613 67 0 5,946 0 967 484 8,076
September 609 36 0 4,864 0 929 468 6,906
October 607 35 0 4,305 0 853 441 6,241
November 727 130 2 4,080 0 896 407 6,242
December 912 97 24 4,736 0 960 429 7,159

Coal includes anthracite, bituminous, subbituminous, lignite, and waste coal; synthetic coal and refined coal; and beginning in 2011, coal-derived synthesis gas. Prior to 2011 coal-derived synthesis gas was included in Other Gases.
Petroleum Liquids includes distillate and residual fuel oils, jet fuel, kerosene, waste oil, and beginning in 2011, propane. Prior to 2011 propane was included in Other Gases.
Petroleum Coke includes petroleum coke-derived synthesis gas. Prior to 2011, petroleum coke-derived synthesis gas was included in Other Gases.
Other Gas includes blast furnace gas and other manufactured and waste gases derived from fossil fuels. Prior to 2011, Other Gas included propane and synthesis gases.
See the Technical Notes for fuel conversion factors.
Renewable Sources include wood, black liquor, other wood waste, biogenic municipal solid waste, landfill gas, sludge waste, agriculture byproducts, other biomass, geothermal, and solar thermal.
Other includes non-biogenic municipal solid waste, batteries, hydrogen, purchased steam, sulfur, tire-derived fuel, and other miscellaneous energy sources.
Notes: Beginning with 2001 data, non-biogenic municipal solid waste and tire-derived fuels are reclassified as non-renewable energy sources and included in Other. Biogenic municipal solid waste is included in Other Renewable Sources.
Beginning with the collection of Form EIA-923 in January 2008, the methodology for separating the fuel used for electricity generation and useful thermal output from combined heat and power plants changed. The new methodology was retroactively applied to 2004-2007, as well as 2008-2015. Beginning with the 2016 Form EIA-923 data, the methodology for seperating the fuel used for electricity generation and useful thermal output from CHP plants was updated. This update will apply to the 2016 data and future data years. See the Technical Notes (Appendix C) for further information.
See Glossary for definitions. Values are final. See Technical Notes for a discussion of the sample design for the Form EIA-923 and predecessor forms.
Totals may not equal sum of components because of independent rounding. NM=Not meaningful due to large standard error. W=Withheld to avoid disclosure of individual company data.
Sources: U.S. Energy Information Administration, Form EIA-923, Power Plant Operations Report; U.S. Energy Information Administration, Form EIA-906, Power Plant Report; U.S. Energy Information Administration, Form EIA-920 Combined Heat and Power Plant Report; and predecessor forms.
Beginning with 2008 data, the Form EIA-923, Power Plant Operations Report, replaced the following: Form EIA-906, Power Plant Report; Form EIA-920, Combined Heat and Power Plant Report;
Form EIA-423, Monthly Cost and Quality of Fuels for Electric Plants Report; and Federal Energy Regulatory Commission, FERC Form 423, Monthly Report of Cost and Quality of Fuels for Electric Plants.