Housing conditions and energy efficiency Households according to whether they have an adequate temperature in the housing in cold months or in summer, by income quintile per unit of consumption. Unidades: Percentages. Not warm enough during the cold months Not cool enough during the summer Total 27,5 33,6 First quintile 38,9 41,3 Second quintile 34,2 37,8 Third quintile 28,1 33,8 Fourth quintile 21,8 30,9 Fifth quintile 15 24,8 Notas: Income per unit of consumption is obtained, for each household, by dividing total household income by the number of units of consumption. The distribution of persons is taken. Fuente: Instituto Nacional de Estadística