This guy measured 16% efficiency boiling H2O in an open pot, & 27% for covered one. Lower than I would have expected! <a href="http://physics.ucsd.edu/do-the-math/2012/05/burning-desire-for-efficiency/">http://physics.ucsd.edu/do-the-math/2012/05/burning-desire-for-efficiency/</a>

Kelsey Jordahl

@kajord