About: http://webisa.webdatacommons.org/343673009

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	If you have ducting in an unconditioned area such as a crawl space or an attic, this is the greatest loss of heat since the methods of ducting used in the past were very poor.
http://www.w3.org/ns/prov#wasQuotedFrom	vashonheating.com