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