90% of the housing in Iceland is heated with direct geothermal. 9% is heated with electricity and just under 1% with oil – mostly in the most rural areas and small island communities. 29 district heating utilities are members of Samorka. Each district heating utilitiy services an area ranging from one municipality to several adjoining municipalities.

Most district heatings sell water according to measured use. However, three sell previously determined quantities and two according to measured energy use. Almost all district heating utilities are in public ownership, with HS Veitur (a minority share) the main exception.