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Air source heat pump and oil boiler

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    #32
    Wobs
    Registered Users Posts: 247 ✭✭Wobs


    Hi Mick2907,

    One of the reasons your costs are so high is because you are trying to run rads off it. Heat pumps are designed to run at low temperatures and are only suited to UFH. Youo will find a lot of people who complain about running cost's of heat pumps have rads.

    Can you tell us:

    How big your house is?
    The size of the heat pump (KW)?
    The size of your collector bed?

    Heat pumps very well work if they are sized correctly in a well insulated house with UFH!


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    #33
    Lightning McQue
    Closed Accounts Posts: 112 ✭✭Lightning McQue


    Its an air to water heat pump

    11 Kw as far as I can remember

    Its COP at A+2/w35 is 3.40

    Lightning


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    #34
    Wobs
    Registered Users Posts: 247 ✭✭Wobs


    Thanks Lightning,

    I guess from the thread title I should have known it was an air to water:rolleyes:

    Mick does your system have a buffer tank for the defrost cycle? One of the main problems with air to water systems is the moisture content in our air causes the evaporator's to freeze alot. A well installed system should have a buffer tank to defrost it and not rely on an electrical element to do it!


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    #35
    al2009
    Registered Users Posts: 174 ✭✭al2009


    Do they not use reverse cycle to defrost?

    al


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    #36
    Wobs
    Registered Users Posts: 247 ✭✭Wobs


    Yeah sorry some use reverse cycle or heating element. But the best way is to use a buffer tank. Unfortunatley this puts up the price of the system so alot of guys won't include it!


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    #37
    Lightning McQue
    Closed Accounts Posts: 112 ✭✭Lightning McQue


    Wobs

    Are you sure about this?

    The cost of the air source heat pump = cost of ground source + collector

    You save on the excavation costs.

    The price for the Dimplex mentioned above for the air source and ground source worked out at the same.

    Lightning


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    #38
    reidyj
    Registered Users Posts: 28 ✭reidyj


    Hi Mick, did you ever reduce your bills. I work with heatpumps i might be able to offer some help if you like? The Dimplex LA11 is a great system if set up properly and correctly sized. If you dont mind me asking (i wont ask for compnay name) where was the company based you dealt with?

    J


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    #39
    The First Guru
    Registered Users Posts: 17 ✭The First Guru


    80 degree heat pumps have been available for over two years now.
    Why wait?


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    #40
    muffler
    Registered Users Posts: 46,015 ✭✭✭✭muffler


    The First Guru wrote: »
    80 degree heat pumps have been available for over two years now.
    Why wait?
    And this thread has been dead for 2.5 years now. Please dont gravedig old threads.

    Locked.


This discussion has been closed.
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