Survey on Households and the Environment Percentage of dwellings with heating, by type of household and number of rooms with heating and months of using heating Units: % over the total number of dwellings ,With heating,Heating in all or in the majority of rooms (*),Heating only in part of the rooms (*),Use of heating less than month (*),Use of heating between one and three months (*),Use of heating between three and six months (*),Use of heating between six months or more (*),Use of heating: Does not know / Does not answer (*), TOTAL,70.3,71.3,28.7,8.9,37.2,43.9,8.5,1.4, Single-person household,63.1,64.3,35.7,9.3,39.1,41.8,8.1,1.7, Couple alone,71.9,71.6,28.4,8.7,37.9,43.7,8.4,1.3, Couple with children,75.5,74.7,25.3,8.6,36.4,45.2,8.6,1.2, Father or mother alone with at least one child,68.5,69.9,30.1,9.7,36.1,42.9,10.1,1.3, Another type of household,60.9,68.2,31.8,9.6,37.2,43.5,7.2,2.5, Notes: 1) (*) over the total dwellings with heating Source: National Statistics Institute