About: http://webisa.webdatacommons.org/18494527

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Vented system boilers require a storage tank but most of the other components are held in the unit itself which means that installation is quicker and cheaper.
http://www.w3.org/ns/prov#wasQuotedFrom	diydoctor.org.uk