PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Gas efficiency has improved.But since electrical energy usually costs three times more than gas, in most of California it is still cheaper to use natural gas, if you have a choice.Energy Factors" vary because different water heaters are made to be more energy efficient.
http://www.w3.org/ns/prov#wasQuotedFrom
  • supplyhouse.com