Swedish heat energy system – new tensions and lock-ins after a successful transition

Sweden has significantly decarbonised its heating sector, with fossil fuels now accounting for less than 5% of heating energy. This was achieved through the expansion of district heating and heat pumps, supported by carbon taxes introduced in 1991 and a pragmatic approach to shared infrastructure. However, the system is now characterised by a 'supply-dominated' lock-in, where the focus remains on maintaining production rather than reducing demand. This is evidenced by high average indoor temperatures (21.2°C to 22.3°C) and resistance to more stringent energy efficiency standards. Additionally, an increasing reliance on waste incineration has led to over-capacity and a dependency on imported waste, potentially conflicting with EU directives. The report warns that rising temperatures from climate change and stricter EU energy performance requirements will further decrease heat demand, necessitating a shift toward demand-reducing technologies and increased integration of industrial waste heat.

• Sweden has successfully transitioned to a low-carbon heating system, reducing the share of fossil fuels for heating to below 5% and achieving the highest share of renewable energy for heating in the EU, which stands at approximately 70%.
• The heating system is dominated by two complementary technologies: district heating, which provides over 50% of heat for the building stock and has an 85% market share in multi-dwelling buildings, and heat pumps, which are the primary source for single-dwelling houses.
• The system suffers from a supply-side lock-in, where the priority is self-sustained production rather than reducing energy demand. This is reflected in high indoor temperatures—averaging 21.2°C in single-dwellings and 22.3°C in multi-dwellings—which are significantly higher than in other European countries like the UK.
• District heating operates as a natural monopoly because the high cost of parallel infrastructure prevents effective competition, allowing district heating firms to define how the system develops.
• There is a growing and problematic reliance on waste incineration for heat production, which accounts for 22% of total heat production (14.7 TWh in 2015). This has led to over-capacity, requiring Sweden to import 1.6 million tonnes of waste in 2015 to fuel its plants.
• Swedish building energy standards are not sufficiently stringent and lag behind EU directives; for example, the standard for central Sweden is 110 kWh/m2/year, which is double the level envisioned by the EU.
• The heat energy system faces future instability due to market saturation for heat pumps, the need for building renovations, and rising temperatures caused by climate change, all of which will reduce the overall demand for heat.

APA

Dzebo, A., & Nykvist, B. (2017). Swedish heat energy system – new tensions and lock-ins after a successful transition. Stockholm Environment Institute. https://www.sei.org/mediamanager/documents/Publications/SEI-2017-PB-Dzebo-Nykvist-SweHeatEnergySystem-eng.pdf

Chicago

Dzebo, Adis, and Björn Nykvist. Swedish heat energy system – new tensions and lock-ins after a successful transition. Stockholm Environment Institute, 2017. https://www.sei.org/mediamanager/documents/Publications/SEI-2017-PB-Dzebo-Nykvist-SweHeatEnergySystem-eng.pdf.

Wikipedia

{{cite report |last1=Dzebo |first1=Adis |last2=Nykvist |first2=Björn |title=Swedish heat energy system – new tensions and lock-ins after a successful transition |publisher=Stockholm Environment Institute |date=2017 |url=https://www.sei.org/mediamanager/documents/Publications/SEI-2017-PB-Dzebo-Nykvist-SweHeatEnergySystem-eng.pdf |access-date=17 August 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{dzebo2017swedish, author = {Dzebo, Adis and Nykvist, Björn}, title = {{Swedish heat energy system – new tensions and lock-ins after a successful transition}}, institution = {Stockholm Environment Institute}, year = {2017}, url = {https://www.sei.org/mediamanager/documents/Publications/SEI-2017-PB-Dzebo-Nykvist-SweHeatEnergySystem-eng.pdf}, urldate = {2026-08-17}, note = {Indexed by Climate Insights Directory} }