We're told that by switching off your geyser when you're not using it, like during the day when you're at work, saves electricity, but is this correct? When you keep switching your geyser on and off it has to keep heating up cold water, but when you have it on all the time it maintains it at some temperature. Doesn't it take more electricity to heat up cold water that it takes to maintain some temperature, in the same way it takes more energy to accelerate to some speed than to maintain that speed? So does turning your geyser off during the day actually save water or not? Wouldn't the better thing be to set your geyser to heat the water to a slightly lower temperature?