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Weekly cost oil radiators + large immersion heater
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How much would it cost to run 4 double oil radiators and a large immersion heater x 6 hours daily?
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As Deggers says, without knowing the wattage of the equipment and your electricity cost per unit it can only be a guess.
but, as an example, if we assume the radiators are 2KW and the Immersion heater is 3KW then all of them together will add up to 11KW, and as Electricity usage is measured in KW/h (or Kilowatt hours) which means one unit of electricity is how much it takes to run 1KW for one hour it's easy enough to work out.
if you were paying 14p per unit then it will cost you 14p to run one KW for one hour.... so to run 11KW for one hour is 14*11=154p
then to run 11KW for 5 hours is 154*5=770p
So assuming the power ratings of the equipment above, and a cost of 14p per unit of electricity it would cost you £7.70 to run them for 5 hours continually
HOWEVER!!!
None of the above equipment would be on all the time for the whole 5 hours. the immersion heater will get the water up to temp and then switch off until the water temp either drops on it's own, or you use some of the water. similarly the radiators will be only be on until the temperature reaches whatever you've set their room thermostats to and then they'll switch off until the temperature in the room drops enough to make them come on again. during the periods that any of them are off they'll be using no electricity (well as near as makes no difference)
but, as an example, if we assume the radiators are 2KW and the Immersion heater is 3KW then all of them together will add up to 11KW, and as Electricity usage is measured in KW/h (or Kilowatt hours) which means one unit of electricity is how much it takes to run 1KW for one hour it's easy enough to work out.
if you were paying 14p per unit then it will cost you 14p to run one KW for one hour.... so to run 11KW for one hour is 14*11=154p
then to run 11KW for 5 hours is 154*5=770p
So assuming the power ratings of the equipment above, and a cost of 14p per unit of electricity it would cost you £7.70 to run them for 5 hours continually
HOWEVER!!!
None of the above equipment would be on all the time for the whole 5 hours. the immersion heater will get the water up to temp and then switch off until the water temp either drops on it's own, or you use some of the water. similarly the radiators will be only be on until the temperature reaches whatever you've set their room thermostats to and then they'll switch off until the temperature in the room drops enough to make them come on again. during the periods that any of them are off they'll be using no electricity (well as near as makes no difference)
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