Power plants

We produce heat, electricity and cooling in power plants and heating plants in different parts of Helsinki. Find out about the power plants and their production outputs.

Vuosaaren voimalaitokset

Vuosaari power plants

The Vuosaari combined cycle power plants produce a major part of electricity and district heat in Helsinki. Thanks to combined cycle technology, the efficiency of the plants is up to 93%. The power plants use natural gas as fuel.

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Hanasaari power plant

The fuels used at the Hanasaari power plant are hard coal and renewable wood pellets. The flue gas cleaning systems and combustion technology at the power plant have been developed in the recent years.

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Hanasaaren voimalaitos

Salmisaari power plant

Salmisaari power plant

The Salmisaari power plant produces heat and power from hard coal and wood pellets. A reception, storage and feeding system for pellets was built at the plant in order to increase the amount of renewable energy.

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Heating plants

Heating plants located in various parts of Helsinki guarantee a sufficient heat supply during extremely cold weather, in power plant fault situations and during maintenance outages. 

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Heating plants

Katri Vala heat pump

Katri Vala heating and cooling plant

Katri Vala is the largest heat pump plant in the world to produce heat and cooling. Its carbon dioxide emissions are over 80 per cent lower than, e.g. in separate heat production using heavy fuel oil.

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Esplanade heating and cooling plant

Inaugurated in 2018, the heating and cooling plant reduces Helen’s carbon dioxide emissions by about 20,000 tonnes per year.

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Esplanadin lämpö- ja jäähdytyslaitos

Hydropower plants

Hydropower plants on the river Kymi

The hydropower plants on the River Kymijoki are located in Ahvenkoski, Mankala, Klåsarö and Ediskoski.

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Power plant museum of Vanhakaupunki

The Vanhakaupunki hydropower plant is the oldest working power plant in Helsinki. It is open for museum visitors during the summer.

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Power plant museum of Vanhakaupunki

Kellosaari stand-by power plant

Kellosaari stand-by power plant

The Kellosaari reserve power plant ensures sufficient electricity supply in Finland, especially in Helsinki. It is in operation rarely, and only for a short duration at a time.

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Suvilahti solar power plant

The Suvilahti solar power plant in Helsinki started operations in spring 2015. You can monitor solar power production in real time on the power plant’s website.

Suvilahti solar power plant

Kivikko solar power plant

Kivikko solar power plant

Finland’s biggest solar power plant on completion, the Kivikko solar power plant started operations in April 2016. Its annual production is approximately 700 megawatt-hours, which corresponds to the annual consumption of 350 one-bedroom apartments. You can monitor solar power production in real time on the power plant’s website.

Messukeskus solar power plant

In December 2019 a solar power plant consisting of 1,913 panels was completed on the roof of the Messukeskus Expo and Convention Centre. The output of the panels is 315 W. The average annual production of one panel corresponds to 14 per cent of the electricity consumed by a one-bedroom apartment.

You can monitor solar power production in real time on the power plant’s website.

See also


Energy for the future

Many different solutions are needed to tackle the global climate challenge – and everyone must contribute to this effort.


Energy production

We produce energy effectively with combined and heat and power generation and balance the production with heat and cooling accumulators. We produce solar power in our own plants, and we buy the rest of the renewable energy from other parts of the country.


Origin of energy

See what we use for producing electricity, district heat and district cooling.


Specific emissions of energy production

We report the emissions released per each produced energy unit.


Energy sources

Our energy sources include coal, natural gas, nuclear power, hydro power, waste heat, sea water, wood pellets, biogas, fuel oil, as well as wind power and solar energy.


Vuosaari power plants


Hanasaari power plant


Salmisaari power plant


Heating plants


Katri Vala heating and cooling plant


Esplanade heating and cooling plant


Hydropower plants on the river Kymi


Kellosaari reserve power plant

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