About: http://webisa.webdatacommons.org/139444617

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	Drain back systems are a smart choice when designing a solar thermal system to supplement central heating and domestic hot water heating when overheating during the warmer months is a problem.
http://www.w3.org/ns/prov#wasQuotedFrom	siliconsolar.com