Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Aanvullende verwarming-nl#Sense
Chauffage d'appoint-fr#Sense
Suppleringsvarme-da#Sense
Zusatzheizung-de#Sense
Supplementary heating-en#Sense
Tilskudsvarme-da#Sense
Bijstook-nl#Sense