In article >, "Rod Speed" > wrote:
>Giusi wrote
>> Bob F > wrote
>
>>>> How can that be true, no hot water is wasted in a cold fill dishwasher.
>
>>> But heating it may cost more, if the water heater is gas, for instance.
>
>> No,
>
>Yes, he did say MAY.
>
>> because a tank water heater works 24/7 no matter how cheap
>
>Plenty of the water heaters dont store the hot water.
>
>> (and that's strictly temporary) gas may be.
>
>Not necessarily.
>
>> The dishwasher fills with a couple of liters of water, rinses, drains, then 3
> liters that it heats.
>
>Yes, but a dishwasher that uses piped hot water doesnt have to use hot water
> all the time.
>
>> It takes less than a minute to heat because it is so little water. Same for
> the rinses.
>
>The rinses arent necessarily done with hot water. Only my last one is.
>
>> We are encouraged to use our dishwashers in Italy because it uses less water
> and energy than handwashing.
>
>The energy claim is very dubious, particularly with drying.
>
>> Potable water and energy are both a potential big problem here.
>
>But they dont necessarily use less total energy, particularly with drying.

i always throw in the fodd along with my dishes, why waste energy ???

http://www.salon.com/nov96/salmon961118.html