Crosswords1 min ago
boiling kettle for washing up
which is more economical?
filling the kettle to the recommended maximum level and boiling it twice for washing up....or out of the tap using economy 7 tariff?
i have no hot water in my flat at the moment other than out of the shower. there's no gas supply as it's all electric and i haven't got the heating on cos it's coming up to summer
filling the kettle to the recommended maximum level and boiling it twice for washing up....or out of the tap using economy 7 tariff?
i have no hot water in my flat at the moment other than out of the shower. there's no gas supply as it's all electric and i haven't got the heating on cos it's coming up to summer
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Depending on your electricity tarriff there may be a 3:1 difference in cost of electricity.
But there are substantial differences. The hot water tank will never reach boiling point unlike the kettle. The amount of water in the kettle is a fraction of that in the tank so you are only heating what you require. There is a certain amount of heat loss in the tank so this has to be replentished. The cost of boiling a kettle is easily calculated.
Most kettles are usually 3 KW. That means for every hour it will use 3 units. The cost of a unit is given with your bill.
eg if a unit costs 15p and the kettle takes 4 minutes to boil the cost would be 15x3x4/60=3p x 2=6p
Therefore the kettle would win hands down.
But there are substantial differences. The hot water tank will never reach boiling point unlike the kettle. The amount of water in the kettle is a fraction of that in the tank so you are only heating what you require. There is a certain amount of heat loss in the tank so this has to be replentished. The cost of boiling a kettle is easily calculated.
Most kettles are usually 3 KW. That means for every hour it will use 3 units. The cost of a unit is given with your bill.
eg if a unit costs 15p and the kettle takes 4 minutes to boil the cost would be 15x3x4/60=3p x 2=6p
Therefore the kettle would win hands down.
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