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