About: http://webisa.webdatacommons.org/7818239

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	I have studied the set up and besides the air vent there is a control valve (colored red) that is in line with the pipe to the hot rads.
http://www.w3.org/ns/prov#wasQuotedFrom	terrylove.com