tag:blogger.com,1999:blog-31006871.post-33928194114373726812008-02-04T21:15:00.000+02:002008-02-04T21:15:00.000+02:002008-02-04T21:15:00.000+02:00Paul, the energy saving is not really that big (energy = power x time, hence measured and sold in kilowatt hours - kWh).<BR/><BR/>Like you said, it is about moving the demand to another time, which is the current issue we have.<BR/><BR/>You probably will save a small amount of energy by doing it, but nothing too significant. Think of it this way: the greater the difference in temperatures the faster the geyser will cool down. So if the geyser cools a little, then it starts to cool a little slower.<BR/><BR/>If you keep the temp high (like a thermostat does) then it has to use a little more energy (because it cools faster) to keep it close to the set temp. Turning it off for a while means it will be on (consuming energy) for a little bit less in a day.<BR/><BR/>Probably easier to explain with a picture.<BR/><BR/>Most importantly though, you got the point with the load shifting.Duncan Drennanhttp://www.blogger.com/profile/18356141566912975917noreply@blogger.com