Housing conditions and energy efficiency Households according to whether they have an adequate temperature in the housing in cold months or in summer, by size of the household. Unidades: Percentages. ,Not warm enough during the cold months,Not cool enough during the summer, Total,27,5,33,6, 1 member,30,5,34,9, 2 members,26,8,32,7, 3 members,26,3,33,2, 4 members,24,1,31,8, 5 members or more,29,9,38,9, Notas: Fuente: Instituto Nacional de Estadística