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Hot water cylinder. What's more economical

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  • 16-11-2009 10:08pm
    #1
    Canaboid
    Registered Users Posts: 1,641 ✭✭✭


    This may be a silly question but here goes.
    Recently had a new cylinder fitted with spray on polyurethane insulation. It's standard size and has a thermostat fitted.

    Is it more economical to leave it on all the time so it constantly keeps water at set temperature or turn on when needed to heat from cold ?

    Hot water usage would be standard - washing up, hand washing, 2 showers in evening, bath for kids twice a week etc. nothing out of the ordinary.

    Thanks in advance for any thoughts.


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    #2
    gsxr1
    Closed Accounts Posts: 3,167 ✭✭✭gsxr1


    Canaboid wrote: »
    This may be a silly question but here goes.
    Recently had a new cylinder fitted with spray on polyurethane insulation. It's standard size and has a thermostat fitted.

    Is it more economical to leave it on all the time so it constantly keeps water at set temperature or turn on when needed to heat from cold ?

    Hot water usage would be standard - washing up, hand washing, 2 showers in evening, bath for kids twice a week etc. nothing out of the ordinary.

    Thanks in advance for any thoughts.

    use it only when needed.

    I have the same type . We have heated the water with use of the immersion for 2 months to test that same theory. Our lecky bill was through the roof.
    We then used our gas boiler. very modern and efficient . less than half the cost to keep water warm.

    there is usually a bath/sink switch on the immersion switch. I use the sink setting for a quick boost once in a while.
    there is 2 heating elements with the electric heat.
    SINK . is a short heating element heating the top section of the tank. (10 Min)
    BATH. A long heating element. Heating the whole tank. (takes ages).

    Have a look at your ESB meter when its on. Watch it spin. it goes crazy fast.


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    #3
    Joey the lips
    Registered Users Posts: 10,262 ✭✭✭✭Joey the lips


    If you are interested in economy there is a heater on the market called a willis immersion heater. I cannot remember the exact principles for a couple of reasons and one being the fact I am up hours and my head hurts but the general principle is that it heats a small amount of water rapidly enough for sinks etc.

    From all accounts it is very economical and can be fit inline. I bought a couple trade from excel-industries but I am sure any plumber can get them in most places as its not an exclusive product.


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