Survey on Households and the Environment Classification by characteristics of the dwelling Percentage of dwellings, by type of municipality and available heating system Units: % over the total number of dwellings Availability of heating Electrical heating: Total Electrical heating: Individual electrical furnace Electrical heating: Electrical radiators and accumulators Electrical heating: Underfloor heating Gas heating: Total Central gas heating Individual gas heating Non-channelled gas heating Central diesel heating : Total Central diesel heating Individual diesel heating Other heating systems: Total Other heating systems: Heat pump: Total Heat pump: Channelled Heat pump: Non-channelled Other heating systems: Coal central heating Other heating systems TOTAL 70.3 18.6 4.6 14.0 0.7 32.3 6.6 23.4 2.5 11.7 7.0 4.8 12.8 6.3 2.3 4.0 0.5 2.8 Provincial capitals and municipalities with more than 100,000 inhabitants 71.2 17.4 5.3 12.5 0.6 40.4 9.2 30.0 1.4 8.3 1.7 6.8 9.4 5.5 2.4 3.1 0.9 0.6 50,000 to 100,000 inhabitants 64.3 18.9 5.3 14.0 0.8 33.6 6.0 25.1 2.9 3.9 1.8 2.1 13.4 7.7 2.5 5.2 0.1 1.7 20,000 to 50,000 inhabitants 68.3 21.8 4.3 16.9 1.1 29.1 6.0 20.1 3.5 7.6 5.2 2.3 15.5 10.5 3.3 7.3 0.1 2.4 10,000 to 20,000 inhabitants 71.6 23.0 4.2 18.7 0.7 28.2 5.7 19.6 3.0 12.2 8.7 3.5 12.7 5.5 1.6 3.9 0.0 2.5 Fewer than 10,000 inhabitants 71.7 16.7 3.2 12.9 0.9 19.7 2.5 13.6 3.8 24.5 20.2 4.3 17.8 4.7 1.6 3.1 0.4 8.1 Notes: Source: National Statistics Institute