About: http://webisa.webdatacommons.org/19208513

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	You didn't state what part of the country you are in, or if there is an attic, and if the ductwork to the upstairs unit is in the attic.
http://www.w3.org/ns/prov#wasQuotedFrom	hvac-talk.com