About: http://webisa.webdatacommons.org/156521875

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	Yes, a fan controller is the best bet, but a relay with the power side going from battery through the relay to the fan, and your toggle on the switch side of the relay should work fine.
http://www.w3.org/ns/prov#wasQuotedFrom	stangnet.com