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Heat pump questions

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  • 22-06-2019 10:43am
    #1
    Jcanty85
    Registered Users Posts: 95 ✭✭


    Hi all,

    We are at the start of a self build and while previously we were thinking about various boiler options we now are decided on heat pump/aluminium rads (brought around by a number of factors namely the recent climate change report). So many options available, most installers seem to recommend daiken units, however one did mention a hybrid gas unit. Just wondering if there is any pros/cons to this system? Also we will prob have to add in some solar/pv to get part L compliant so I'm wondering if the general consensus is that it's better/easier to link in PV to offset the running costs or would it be better to add solar tubes to look after the hw for a large part of the year? All thoughts, advice or suggestions is greatly appreciated.


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    #2
    Ubbquittious
    Registered Users Posts: 6,189 ✭✭✭Ubbquittious


    Jcanty85 wrote: »
    Hi all,

    We are at the start of a self build and while previously we were thinking about various boiler options we now are decided on heat pump/aluminium rads (brought around by a number of factors namely the recent climate change report). So many options available, most installers seem to recommend daiken units, however one did mention a hybrid gas unit. Just wondering if there is any pros/cons to this system? Also we will prob have to add in some solar/pv to get part L compliant so I'm wondering if the general consensus is that it's better/easier to link in PV to offset the running costs or would it be better to add solar tubes to look after the hw for a large part of the year? All thoughts, advice or suggestions is greatly appreciated.

    Daiken is a good brand. PV wont do much to heat your house. I suppose they recommend the combo gas/ashoop unit so you have an extra source of heat during the times it gets really nippy. But you might not need that if you already have a stove or some other source of heat


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    #3
    dathi
    Registered Users Posts: 1,386 ✭✭✭dathi


    you can do either or both tubes will give you more hot water as they have a higher efficiency than PV but have more maintenance than pv. you can also get a pv diverter which will divert excess electricity (above your baseload) to the immersion on your cylinder


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    #4
    antoinolachtnai
    Registered Users Posts: 9,774 ✭✭✭antoinolachtnai


    You need to get this all in perspective.

    Heating hot water for a typical household will cost you a few hundred a year, even if you heat the water with peak rate electricity using the immersion. (If you have the heat pump, you should be able to do it more cheaply than that.)

    Unless you use immense amounts of hot water, it is just not worth investing a load of money in tubes (capital cost and maintenance) just to heat water for part of the year.

    But there is no general consensus. It really depends on your house design. You would really benefit from professional advice on all this taking into account your likely needs and your design, and this would give you the best advice on how to meet the Part L requirements.


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