To me, the most interesting statistic in the article is that the overall efficiency of heating water with a Vitamix blender is 68-69%. That is, more than 2/3

To me, the most interesting statistic in the article is that the overall efficiency of heating water with a Vitamix blender is 68-69%. That is, more than 2/3 of the input wattage coming from the wall goes to heating the mixture being blended. The overall efficiency of heating a cup of water in a microwave oven, by contrast, is usually less than 50%.[1] I find that to be a remarkably high efficiency. It's obviously less efficient than an immersion resistance heater (100% efficiency since all the "waste" heat is absorbed), but I wouldn't have guessed that the high speed motor would be that efficient in converting electricity into rotational motion. [1] Tom Murphy measures 43% for a microwave oven here (as well as figures for other approaches): http://physics.ucsd.edu/do-the-math/2012/05/burning-desire-for-efficiency/ http://physics.ucsd.edu/do-the-math/2012/05/burning-desire-f...