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Efficient but cost effective Enery Sources

  • 19-06-2008 9:24pm
    #1
    Registered Users, Registered Users 2 Posts: 13


    I have been looking into energy sources for c3000sq ft concrete house.
    Geothermal is costing about 24k.(very expensive and is it worth it)
    Alternative:
    I was thinking of using oil heating with underfloor heating upstairs and downstairs. This should be effieicnt but is it possible to have hot water as the boiler will be on low temp for underfloor heating.This costs about 9500 euro.

    I also looked into more efficient windows (6k) and better house insulation (4500 euro).

    Finally I am looking into installing a 20kw hercules(3k) back boiler. Are these efficient, safe and useful?

    Is the geothermal worth the extra cost rather than the number of other smaller changes.
    Thanks


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Comments

  • Closed Accounts Posts: 5,433 sinnerboy
    ✭✭✭


    first , if it's not too late , design the house with large glazed areas to south , small glazed areas to north - avail of free solar heat

    invest in the building fabric first - m+e second

    look to prioritise spending on insulation and air tightness

    then look at heat recovery ventilation

    then and only then look at how you provide heat , having reduced your demand for heat . this means solar panels , heat pump , bolier etc

    you may wish to use solar anyhow - b regs will soon require a min % of energy requirement to be provided by renewables . solar may be default option , wood pellet stoves another . heat pumps will be too expensive for mass compliance


  • Registered Users, Registered Users 2 Posts: 1,477 topcatcbr
    ✭✭✭


    sinnerboy wrote: »
    first , if it's not too late , design the house with large glazed areas to south , small glazed areas to north - avail of free solar heat

    invest in the building fabric first - m+e second

    look to prioritise spending on insulation and air tightness

    then look at heat recovery ventilation

    then and only then look at how you provide heat , having reduced your demand for heat . this means solar panels , heat pump , bolier etc

    you may wish to use solar anyhow - b regs will soon require a min % of energy requirement to be provided by renewables . solar may be default option , wood pellet stoves another . heat pumps will be too expensive for mass compliance


    I agree 100%
    with nothing more to add


  • Closed Accounts Posts: 146 Chimpster
    ✭✭


    Yeah, that pretty much sums it up alright.

    One question though, will a wood buring stove count for reaching the required percentage of renewables?

    Thanks.


  • Closed Accounts Posts: 5,433 sinnerboy
    ✭✭✭


    Chimpster wrote: »
    Yeah, that pretty much sums it up alright.

    One question though, will a wood buring stove count for reaching the required percentage of renewables?

    Thanks.

    in some case maybe . 30% secondary heating provided by stove may be enough - DEAP calc will indicate


  • Registered Users, Registered Users 2 Posts: 12,555 AckwelFoley
    ✭✭✭✭


    16kw air source heat pump, underfloor up and down all supplied and fitted.

    aprox 25k.

    imo, geothermal can be a little expensive is you need to vertical bore.


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  • Closed Accounts Posts: 668 karen3212
    ✭✭✭


    sinnerboy wrote: »
    first , if it's not too late , design the house with large glazed areas to south , small glazed areas to north - avail of free solar heat

    invest in the building fabric first - m+e second

    look to prioritise spending on insulation and air tightness

    then look at heat recovery ventilation

    then and only then look at how you provide heat , having reduced your demand for heat . this means solar panels , heat pump , bolier etc
    Totally agree with this,
    also ensure that the more lived in rooms are on the south sunny side, and bathrooms, bedrooms etc on the north side.

    For me, if I ever move and build, I'll be getting underfloor heating(ground pump system), hot air rises and all that...I'm not sure though which is the best or most value for Irish conditions yet though.


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