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Recommend setting for Timer/boiler/Immersion

  • 15-01-2014 9:14am
    #1
    Big Nelly
    Closed Accounts Posts: 8,613 ✭✭✭


    Hi Guys

    This is a bit of a long shot, I was wondering if there is a recommended chart for heating setting for houses? should you raise the temp at the boiler or reduce the temp at boiler and just keep it going for longer?

    I have a house around 125 sq.m / 1345 sq.ft(based on house sold near us). I strip the house down about 6 years ago and done all the external walls with insulated slabs. The under floor with insulation and then just filled up attic with insulation. I also put in all new rads and about 2 years ago put in new gas boiler.

    Just want to see if it is better to just run the boiler at higher temp(temp controls on boiler) for shorter time or run at lower temp for longer period???

    Also I have the boiler heating the water as well as the rads, is it better to just have the gas heating the rads and use immersion to heat the water?

    Thanks


Comments

  • #2
    cobham
    Registered Users, Registered Users 2 Posts: 866 ✭✭✭cobham


    Just to piggyback on this topic.... I cannot make up mind what is better whether to use gas to heat water or immersion. Sink section of immersion on twice a day is sufficient wheras gas will heat full tank. Tank is new and holds heat well due to decent insulation. We have upgraded from oil and now have separate controls for water/rads.


  • #3
    ted1
    Registered Users, Registered Users 2 Posts: 23,888 ✭✭✭✭ted1


    cobham wrote: »
    Just to piggyback on this topic.... I cannot make up mind what is better whether to use gas to heat water or immersion. Sink section of immersion on twice a day is sufficient wheras gas will heat full tank. Tank is new and holds heat well due to decent insulation. We have upgraded from oil and now have separate controls for water/rads.
    What size tank is it? Would you use a full tank?

    A kwh of electricty is 18c, an immersion heater is about 100% efficienct

    A kwh of gas is about 5 cents, a boiler is say 80% efficent do you'll need 1.2kwh. Which comes out at 6 cents per kwh delivered.

    As you have separate controls. Gas would be better


  • #4
    cobham
    Registered Users, Registered Users 2 Posts: 866 ✭✭✭cobham


    Thank you :)

    We would not use a full tank but if heated by the gas on daily basis, it would still be warm from previous day.


  • #5
    Big Nelly
    Closed Accounts Posts: 8,613 ✭✭✭Big Nelly


    Hi Guys

    Any idea's? I know its a long shot!!


  • #6
    antoinolachtnai
    Registered Users, Registered Users 2 Posts: 9,815 ✭✭✭antoinolachtnai


    If it is a condensing boiler, it is in principle more efficient to run it for a longer time on a lower temperature. The reason is that the condensing feature works best when the temperature of the water returning to the boiler is low.

    However, if you don't have separate settings for hot water and for central heating, then you can't put it too low, because the hot water won't be hot enough.

    Best

    Antoin.


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