Naantali G1 2 ja 3 is a 290 MW gas power station in Varsinais-Suomi, Finland. It is operated by Turun Seudun Energiantuotanto Oy. Based on its capacity (estimated), it can supply roughly 327k homes (estimated). It ranks #10 of 203 Finland power plants by installed capacity. Its annual emissions of 154,720 t CO₂/yr (EU ETS verified (EUTL 2023)) are equivalent to about 36k cars driven for a year. In context, gas supplies about 1.2% of Finland's electricity; the national grid averages 57 gCO₂/kWh (96.3% low-carbon) (2025).
Plant data: WRI Global Power Plant Database (CC BY 4.0), id WRI1002466.
Data status
Known data
Calculated from dataset
Not available
Known, modelled and calculated values are kept separate. Missing fields are shown as unavailable.
Data provenance
Capacity and fuel are the upstream open-dataset record, not yet matched to a 2026 registry or GEM entry.
capacity: WRI GPPD; fuel: WRI GPPD
In context: how this plant compares
At 290 MW, Naantali G1 2 ja 3 is well above the median gas plant in Finland (120.6 MW). Gas plants burn natural gas either in open-cycle turbines for fast peaking, or in combined-cycle units that recover exhaust heat in an HRSG to reach roughly 55–62% efficiency — the cleanest-burning fossil option.
Capacity comparison computed from the WRI Global Power Plant Database; fuel-type context is general engineering background.
154,720 t CO₂/yr — in everyday terms
This facility's annual emissions are roughly equivalent to:
Equivalencies via US EPA Greenhouse Gas Equivalencies; emissions per EU ETS verified (EUTL 2023) (measured for US EPA/EU ETS, modelled for Climate TRACE).
Key facts
- Share of Finland gas capacity
- 12.9% of 2,246 MW across 20 plants in this dataset
Calculated from the capacity and generation records in this dataset (WRI Global Power Plant Database (CC BY 4.0)).
Capacity vs largest gas plants in Finland
Installed capacity (MW), WRI Global Power Plant Database (CC BY 4.0).
Owner
Operated by Turun Seudun Energiantuotanto Oy.
Local climate & thermal context
This gas plant burns natural gas in a turbine — often in a combined-cycle setup — to generate electricity. It sits in a warm-summer humid continental climate (Köppen Dfb) — Northern Hemisphere, latitude 60.5°N — which shapes how much energy it can produce and how its output varies through the year.
Monthly mean temperature
Heating degree-days here run 86% above the median power plant in this dataset — a proxy for how much extra energy heated equipment must replace through its surfaces in winter.
Climate heat-demand index: 91/100 — this site sits in the top third of the power plants we cover by heating degree-days.
A gas turbine here also runs ~0% below its ISO (15°C) rating at this annual mean (typical CCGT curve, estimate).
Climate normals: WorldClim 2.1 (1970–2000 monthly normals, 10 arc-min, CC BY 4.0); zone: Köppen-Geiger world climate classification (Kottek et al. 2006, 0.5° grid). Degree-days & heat-demand index computed by PowerAtlas — a modelled heat-demand proxy, not a measured site figure.
Site climate & environmental severity
This site sits in a moderately corrosive environment (estimated ISO 9223 class C3 — Medium), with humidity / wetness the leading environmental stress.
Indicative estimate via the ISO 9223:2012 informative method (atmospheric corrosivity from temperature, time-of-wetness and airborne salinity), using WorldClim climate normals, the Köppen-Geiger class and coast distance. Indicative, not a measured corrosion rate.
How it compares & nearby plants
The #2 largest gas power plant of 20 in Finland by capacity.
Finland has 20 gas power plants in this dataset, together about 2,246 MW of capacity.
Nearby power plants
- Naantali kt · Other · 40 MW · Varsinais-Suomi
- Naantali Reserve power station · Oil · 40 MW · South-Western Finland
- Naantali CHP power station · Coal · 511 MW · Finland Proper
- Linnankatu power station · Coal · 35 MW · Finland Proper
- Askala · Hydro · 1.3 MW · Varsinais-Suomi
- Uusikaupunki · Oil · 14.2 MW · Varsinais-Suomi
Location
Coordinates 60.459, 22.0545 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.
Frequently asked questions
What type of power plant is Naantali G1 2 ja 3?
Naantali G1 2 ja 3 is a 290 MW gas power plant in Varsinais-Suomi, Finland.
Who operates Naantali G1 2 ja 3?
Naantali G1 2 ja 3 is operated by Turun Seudun Energiantuotanto Oy.
How much CO₂ does Naantali G1 2 ja 3 emit?
Naantali G1 2 ja 3 has measured emissions of about 154,720 tonnes of CO₂ per year (EU ETS verified (EUTL 2023)).