About: http://webisa.webdatacommons.org/300995674

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	Field of the Invention The present invention relates to heat exchangers and in particular to auxiliary heat exchangers for central heating units improving the efficiency of such units. 2.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com