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E1 to ??? by replacing a gas boiler with a heatpump ?

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Comments

  • #32
    championc
    Registered Users, Registered Users 2 Posts: 6,437 ✭✭✭championc


    The one thing that I can say for sure is that the house is using the same amount of heat to warm it (as you would absolutely expect).

    In the past year, I analysed my gas usage, especially after replacing the gas hob and oven (Nov 23), and heating water using the immersion and solar tubes.

    The heatpump also confirmed (as I was 100% sure) that the old gas non-condensing non-modulating boiler was very inefficient.

    So 70kWh of gas would give about 50kWh of heat, but the heatpump uses 15kWh of electricity to generate the same 50kWh of heat.

    Yes, I will likely do additional insulation upgrades, but I have concrete evidence that the heatpump, when sized an installed correctly, can substantially reduce the annual heating costs.



  • #33
    Yellow_Fern
    Registered Users, Registered Users 2 Posts: 2,685 ✭✭✭Yellow_Fern


    Regardless of what SCOP you report, on average SCOP is something like 2.8 in real world settings. COP can be down at a 2.4 in winter in studies. I presume this will increase infuture though.



  • #34
    championc
    Registered Users, Registered Users 2 Posts: 6,437 ✭✭✭championc


    Don't think I follow you. My SCOP since 01 Nov 2024 (my earliest data) is 4.01. My lowest daily COP was in the low 3's.

    To suggest that anyone should be happy to have a SCOP across 12 months of 2.8 would be very wrong imo.



  • #35
    blackbox
    Registered Users, Registered Users 2 Posts: 5,047 ✭✭✭blackbox


    https://www.boards.ie/discussion/comment/123243918#Comment_123243918

    I agree with you on some points but clearly you do not understand how a heat pump works.

    They use electricity to collect energy from the outside environment and convert it into a form that will heat the inside of the house. Thus they put more heat into the house than the amount of electrical energy they consume.



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