Survey on Households and the Environment 
Classification by characteristics of the reference person
Percentage of dwellings, by level of studies completed by the reference person and available heating system
Units: %  over the total number of dwellings

	Availability of heating	Electrical heating: Total	Electrical heating: Individual electrical furnace	Electrical heating: Electrical radiators and accumulators	Electrical heating: Underfloor heating	Gas heating: Total	Central gas heating	Individual gas heating	Non-channelled gas heating	Central diesel heating : Total	Central diesel heating	Individual diesel heating	Other heating systems: Total	Other heating systems: Heat pump: Total	Heat pump: Channelled	Heat pump: Non-channelled	Other heating systems: Coal central heating	Other heating systems: wood	
TOTAL	70.3	18.6	4.6	14.0	0.7	32.3	6.6	23.4	2.5	11.7	7.0	4.8	12.8	6.3	2.3	4.0	0.5	2.8	
Without studies	57.1	18.3	3.5	14.8	0.5	19.7	3.2	12.2	4.5	10.3	7.7	2.7	13.0	4.9	1.5	3.4	0.4	3.6	
Primary education or the equivalent	69.7	17.3	3.6	13.8	0.6	31.3	5.5	23.3	2.8	13.5	9.3	4.3	12.5	6.2	1.7	4.4	0.5	3.2	
Stage one secondary education	60.6	20.7	4.9	15.3	1.0	18.9	4.1	12.4	2.5	10.2	7.1	3.1	16.0	7.1	2.5	4.7	0.6	3.2	
Upper-secondary education	75.5	19.0	5.7	13.4	0.8	39.4	9.4	28.1	2.2	11.1	4.8	6.3	11.2	5.5	1.9	3.6	0.6	2.3	
Intermediate level-professional education	74.0	19.6	5.9	14.1	0.8	35.4	7.6	26.1	2.0	11.4	6.5	4.9	15.7	9.1	3.7	5.7	0.5	2.7	
Higher level -professional education	75.9	19.1	5.0	14.2	0.8	39.6	8.5	30.6	1.4	11.5	5.6	5.9	11.7	6.8	3.1	3.9	0.2	1.9	
1st cycle university studies	81.3	20.2	5.4	14.8	1.1	41.2	8.8	31.3	1.1	11.5	5.2	6.3	12.6	7.1	3.4	3.7	0.6	1.7	
2nd or 3rd cycle university studies	83.1	17.8	5.6	12.3	1.0	48.5	11.1	36.7	1.3	11.9	4.5	7.6	10.7	6.0	3.3	2.7	0.5	1.5	
Does not know/ Does not answer	96.7	68.7	.	46.9	21.9	.	.	.	.	27.9	27.9	.	.	.	.	.	.	.	
Notes:

.Data protected by statistical secrecy

Source: National Statistics Institute