Enum - PrimarySource

Key: enum.primarySource

Identifies the energy medium or fuel type flowing through a gauge. Used as the secondary dimension in calorific value and emission factor lookups alongside GaugeMedium (previously alongside a HeatingPower medium enum, which was retired). Carried over from EM2 where these values were integer constants on the HeatingPower entity. Stored as an integer in the database.

The integer values correspond to the EM2 database constants (GaugeType::SOURCE_*). In EM3, primarySource is stored as the integer value directly (smallint), matching EM2 for migration compatibility. The integer is not an internal ID — it is the canonical application-layer value.

Translation note: the source Confluence page gives most descriptions only as Czech fuel/source names. The English translations below are supplied during migration and should be double-checked against the source page.

Values

Integer value	Constant name	Description
1	general	General / unspecified energy source.
2	biomass	Biomass (general) — cs: Biomasa (obecná).
3	biogas	Biogas — cs: Bioplyn.
4	landfillBiogas	Landfill biogas — cs: Bioplyn skládkový.
5	solar	Solar — cs: Solár.
6	otherRenewables	Other renewable energy sources — cs: Jiné OZE.
7	otherNonRenewables	Other non-renewable energy sources — cs: Jiné neOZE.
8	biomassPellets	Biomass — pellets — cs: Biomasa — pelety.
9	biomassStraw	Biomass — straw — cs: Biomasa — sláma.
10	biomassWoodChips	Biomass — wood chips — cs: Biomasa — štěpka.
11	blackCoal	Black (hard) coal — cs: Černé uhlí.
12	brownCoal	Brown coal (lignite) — cs: Hnědé uhlí.
13	coke	Coke — cs: Koks.
14	lfo	Light fuel oil (LFO) — cs: LTO (lehký topný olej).
15	hfo	Heavy fuel oil (HFO) — cs: TTO (těžký topný olej).
16	diesel	Motor diesel fuel (stationary/heating use) — cs: Motorová nafta.
17	naturalGas	Natural gas — cs: Zemní plyn.
18	other	Other (unspecified) — cs: Jiné (nespecifikováno).
19	biomassBriquettes	Biomass — briquettes — cs: Biomasa — brikety.
20	biomassWood	Biomass — wood — cs: Biomasa — dřevo.
21	electricity	Electricity — cs: Elektřina.
22	gasoline	Petrol / gasoline — cs: Benzín.
23	oil	Diesel (vehicle fuel) — cs: Nafta (pohonné hmoty).
24	petroleumGas	LPG — cs: LPG.
25	cngLng	CNG / LNG — cs: CNG / LNG.
26	bioOil	Biodiesel — cs: Bionafta.
27	coldWater	Cold water — cs: Studená voda.
28	hotWater	Hot water — cs: Teplá voda.

References

• heatingPower.primarySource (and other calorific/emission-factor entities' .primarySource)
• calorificValue.primarySource, defaultCalorificValue.primarySource