Nick

@nick@shore.me.uk

Mostly Retired. Consultant. Ex Managing Director. Ex CTO.

Mikrotik, DNS, Routing, IPv6
Live Sound Engineer. Cornet Player

Based in Debenham, Suffolk UK

130 following, 225 followers

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[?]Nick »
@nick@shore.me.uk

@bloor@bloor.tw @simonzerafa@infosec.exchange seems very large, we have a fairly big, not brilliantly insulated house, 16 radiators, and have an 11kw stiebel eltron hp

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    [?]🆎 »
    @bloor@bloor.tw

    @nick @simonzerafa I think we are north of 20 rads

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      [?]Nick »
      @nick@shore.me.uk

      @bloor@bloor.tw @simonzerafa@infosec.exchange lol just recounted we have 18

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        [?]🆎 »
        @bloor@bloor.tw

        @nick @simonzerafa

        Do you have an EPC for your place?

        Here's the relevant excerpt from mine :

        "Heating this property
        Estimated energy needed in this property is:

        20,315 kWh per year for heating
        3,038 kWh per year for hot water"

        My property comes back as a 75 C rating with potential to be 79 (but still C).

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          [?]Nick »
          @nick@shore.me.uk

          @bloor@bloor.tw I don't have the EPC but the proposal states Total Heat Loss: 15,972kWh, back in 2021 we had 16 radiators replaced, the WPL25 hp, new mains pressure tank, and some pipework etc, invoice was 23k, but we then got a 10k green home grant. At the time we needed a new oil boiler and oil tank, and the house was cold in the winter so it was a no brainer

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            [?]Nick »
            @nick@shore.me.uk

            @bloor@bloor.tw our oil bill used to be 2k a year, our whole years electricity including the hp and 2 EVs is 2100 a year

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              [?]🆎 »
              @bloor@bloor.tw

              @nick oil is expensive compared to mains gas though.

              I’d love to get a heat pump to replace this boiler, but my only actual quote so far is £24k … and my other quote which was for £3800 to 4500 ish was withdrawn when they called up. A boiler will be £2500 to 2800 supplied and fitted.

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                [?]Nick »
                @nick@shore.me.uk

                @bloor@bloor.tw imho unless they actually come and visit all quotes are useless

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                  [?]🆎 »
                  @bloor@bloor.tw

                  @nick Yeah, but then even the surveys are chargeable. As it is, I had a plumber to the property doing other work, and he quoted (based on being there) for the boiler option.

                  IIRC both heatpump guys wanted paying for the survey (which is fine, and possibly refundable in some circumstances).

                  Intuitively I really would prefer, right-first-time fit a heatpump. With the sad reality of the situation, it's looking likely a boiler will be what we'll do.

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                    [?]Nick »
                    @nick@shore.me.uk

                    @bloor@bloor.tw just looked up the epc before the heatpump was installed 34,171 kWh per year for heating
                    3,009 kWh per year for hot water

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                      [?]🆎 »
                      @bloor@bloor.tw

                      @nick so quite a bit more than my place, theoretically .. huh

                      so a 16kW heat pump does seem excessive then

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                        [?]Nick »
                        @nick@shore.me.uk

                        @bloor@bloor.tw Thing is they basically guess when they do the EPC so its bogus. eg mine shows stuff that I know is incorrect, but they make assumptions if they can't physically inspect stuff, eg pitched roof insulation

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                          [?]Nick »
                          @nick@shore.me.uk

                          @bloor@bloor.tw see assumptions!

                            [?]Simon Zerafa »
                            @simonzerafa@infosec.exchange

                            @bloor @nick

                            I probably have one somewhere but our house is non standard construction so a HP isn't going to work, without basically rebuilding it.

                            We've installed a efficient gas boiler, have log burners to make use of ash dieback sourced wood and an EV using off-peak charging.

                            Triple glazing is next before the autumn 🫤🤷‍♂️

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