Amid South Africa’s energy crisis, here are some ways to take control of household heating systems.
the appliance off just before using hot water, keeping it off for as long as possible and then switching it on again about two hours before it’s needed.
By switching the geyser off, consumers are delaying that cycle of having to constantly reheat water that is still warm enough to use and which loses thermal energy. This is because using less hot water corresponds to how much energy is used for heating – the hotter something is, the faster it loses energy. When it’s colder, the rate at which water loses energy is less. Therefore, the lower the temperature a geyser is set to, the less energy is needed to heat the water up as it cools.
Of course, the water should still be warm enough for people to enjoy their showers, but, according to articles such as inthe perfect temperature for a shower is between 35°C and 45°C, so there’s little chance one will get cold by limiting a geyser to 55°C.
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