Gas it claims is 40% efficient while Electric Induction is 80 - 90% , although they used unconventional methods to get the numbers from pinballookings link.
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So I looked online and found this info @
http://en.wikipedia.org/wiki/Inducti...ing#Efficiency
According to the U.S. Department of Energy, the efficiency of energy transfer for an induction cooker is 84%, versus 74% for a smooth-top non-induction electrical unit, for an approximate 12% saving in energy for the same amount of heat transfer
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