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Originally Posted by sparkwell
I bought a new Kenwood that shows the number of cups instead of just 1/4 litre, 1/2 litre etc and have already seen a big difference in our bill. I would recommend it,
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Great, but the real money saver is boiling water tap -- or will be when they come down in price a bit (850 euro at the moment).
The reason these save so much energy is that they keep the water at the boiling point in an insulated reservoir. This saves heat loss and heating costs but most important reduces the high energy input 'step' known as latent heat needed to change water to steam. I'm not sure how much of this latent heat quotient is saved (it might be crucial exactly how hot the water is kept) but if my physics is correct this should be a major advantage since it involves much more power consumption per second than is used for the rest of the boiling process.
As for convenience, its terrific because apart from the absence of delay and the greater safety, it's nearly silent.