Survey on Households and the Environment 
Classification by characteristics of the reference person
Percentage of dwellings with thermal insulation or energy-saving lights, by level of studies completed by the reference person and type of insulation or lighting
Units: %  over the total number of dwellings

	With some type of thermal insulation	Canopies	Persian blinds or shutters	Tinted glass or solar protectors	Double glazing for windows	Thermal bridge breaking	With some type of energy-saving lights	Fluorescent tubes or lights	Other energy-saving lightbulbs	
TOTAL	96.2	23.0	94.0	4.1	39.3	11.4	85.5	66.1	67.1	
Without studies	93.3	17.1	91.8	2.1	19.0	4.9	69.0	55.9	41.1	
Primary education or the equivalent	96.0	21.2	94.1	3.7	37.1	9.1	86.1	70.1	63.5	
Stage one secondary education	96.8	23.5	95.2	4.3	35.4	8.5	84.4	63.0	68.6	
Upper-secondary education	95.8	26.2	93.4	4.2	43.2	12.2	89.0	66.9	74.3	
Intermediate level-professional education	97.2	21.4	95.5	5.3	48.9	14.2	90.7	71.1	76.1	
Higher level -professional education	97.3	25.1	94.6	5.1	50.5	19.7	94.5	69.4	80.9	
1st cycle university studies	97.5	27.8	94.6	5.8	51.9	17.8	91.6	68.6	79.5	
2nd or 3rd cycle university studies	98.4	28.6	94.9	5.1	53.9	19.5	92.1	65.9	82.3	
Does not know/ Does not answer	100.0	.	96.7	.	53.1	.	49.8	49.8	27.9	
Notes:

.Data protected by statistical secrecy

Source: National Statistics Institute