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