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Leaving immersion constantly on

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  • 17-10-2012 10:24pm
    #1
    SAN123
    Registered Users Posts: 20 ✭


    Hi was looking to find out how much it is to leave the immersion constantly on 24/7, the immersion in a post 2000.


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    #2
    Cedrus
    Registered Users Posts: 1,429 ✭✭✭Cedrus


    SAN123 wrote: »
    Hi was looking to find out how much it is to leave the immersion constantly on 24/7, the immersion in a post 2000.
    Assuming that you are actually using all that hot water you just multiply,

    Size of heating element (kW) X 24 x 7 x Cost of Electricity (€/kWh) = Cost

    In reality you're not going to be using all of that water and the thermostat will switch it off and on as the water temperature rises and falls around the setpoint. Realistic usage is going to be based on how many heat ups you have based on occupancy (eg 5 mornings for showers, 7 evenings for baths + 2 for laundry)

    Secondly the person paying the bill will turn the immersion off as soon as they spot this strange experiment (possibly using your face :D:mad:).


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    #3
    Cedrus
    Registered Users Posts: 1,429 ✭✭✭Cedrus


    Try This


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    #4
    Thoie
    Registered Users Posts: 6,344 ✭✭✭Thoie


    I did it for about 4 years in the last place I was living (alone). The immersion was very well lagged, and didn't have a timer. Electricity consumption wasn't very high. The hot water was mainly run for a shower in the morning, then washing hands and doing dishes in the evening, so the water wasn't constantly heating.

    In theory, as long as there is minimal heat loss from the immersion (lagged very well), and the thermostat is working properly, the "extra" cost is tiny.

    Why not take a meter reading now, leave the immersion on for 24 hours, then take another meter reading, then another the day after with normal use and see how they compare?


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    #5
    EI: Una
    Closed Accounts Posts: 1,585 ✭✭✭EI: Una


    Hi SAN123,

    I echo Cedrus's suggestion to input this to our appliance calculator (thanks Cedrus).

    It is available online as said, and also as a smartphone app. This will allow you to tailor the calculation to your own specific requirements.

    Regards,
    Una


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    #6
    maddragon
    Registered Users Posts: 590 ✭✭✭maddragon


    Approx cost: 24hours x 3Kw= 72 kWh but as pointed out this does not take into account the insulation or water use. You could probably use 1/4 of this if the cylinder is lagged and you only have a shower etc. in the evening.

    72/4 = 18kWh x €.18 (approx) = €3.24

    Value of not having to get the immersion surgically removed from your body after insertion by the bill payer = Priceless.


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