Heat

SIEC section 8 (not further disaggregated into divisions, groups or classes below the section level). One of the ten top-level sections of the Standard International Energy Product Classification (SIEC); see that page for the classification’s scope rules, coding system and full Table 3.1 code list. Recall that SIEC’s scope only covers heat that is generated and sold to third parties by an economic unit — heat generated and consumed on-site is outside SIEC’s product scope [IRES, Ch. III, para. 3.7, PDF p. 35, 2018].

8 / 80 / 800 / 8000 Heat

The energy obtained from the translational, rotational and vibrational motion of the constituents of matter, as well as changes in its physical state [IRES, Ch. III, SIEC 8000, PDF p. 52, 2018].

Remark: Heat can be produced by different production processes [IRES, Ch. III, SIEC 8000, PDF p. 52, 2018].

As with electricity, SIEC does not disaggregate heat by production process; heat is not a physical substance distinguishable by origin, composition or intended purpose in the way fuels are [IRES, Ch. III, para. 3.15, PDF p. 36, 2018] — see Electricity and Heat Production for the full producer-type, plant-type and generation-source typology.

Chapter VI’s reference list of data items defines gross vs. net heat production and a computed “own use” item (the gap between them) — for autoproducers, gross heat production equals net heat production, since gross heat production only counts heat sold to third parties — see Data Items on Energy Flows and Stocks [IRES, Ch. VI, paras 6.55–6.61, PDF p. 94, 2018].

Related

• SIEC Classification System — SIEC’s scope rules, coding system and full Table 3.1 code list, of which this section is one entry; also covers why electricity and heat are not disaggregated, and the sold-to-third-parties scope condition for heat
• Energy Products — the general energy-product definition and SIEC scope-precision rules this classification operationalizes
• Electricity — the preceding SIEC section, treated identically to heat for classification purposes
• Nuclear Fuels and Other Fuels n.e.c. — the final SIEC section
• Electricity and Heat Production — producer types, plant types and generation-source definitions (IRES Ch. V)
• Data Items on Energy Flows and Stocks — the gross/net production and own-use data items