Boiling point: redesigning the kettle for the 21st century 11 years ago
$120 is expensive.It would take 16 years to make 2 cents on your investment. You don't believe me, here is my calculation:
Regarding energy usage: 1 cup of water is 28 grams t0=25s t1=100s C=4.1810^3J/kg.s Q=mc(t1-t0) for boiling Q=.0284.1810^375=8778J 8778J correspond to 0.00243833333 kilowatt hours so if you pay .11$ per Kw hour we are talking about 2 cents per cup! If we are wasteful and 2 cups of water and drink 1 we have wasted 2 cents. How much time I have wait to make profit on my 120 investment. 120/0.02=6000 And if you drink 1 cup of tea a day. You have wait 6000/365=16 years. You have to wait 16 years to make money on your investment.