Survey completed this morning. Heatloss came out at 4.1kW, as against the 4.3kW I’d calculated using Heatpunk. Few rad changes needed, but most were only a few watts too small, but they’d have to be changed to satisfy MCS. Should class as a standard install, so the £500 fixed price quote should stand, minus the £100 referral from my parents. Daikin 6kW plus a 250L cylinder. Seems like a bargain. Will wait and see what they come back with from the design team. Asked them about OEM L3 monitoring and apparently they won’t install that for me, even as a cost option. I had got the impression that they would supply and fit the kit - is it a question of speaking to the correct person?
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Some people have had success buying the OEM L3 HP monitoring kit themselves then having a quiet word with the install lead when they are on-site. Others have not. It isn’t about talking to the right person at Octopus prior to install, I think they just won’t install it anymore as a matter of course.
IMO, you’re getting a ridiculous bargain with a £400 install. An OEM L3 kit is going to more than double your installation cost. I’d recommend just putting that £100 referral discount towards getting ESPAltherma setup (sorry providers of this forum! 
).
You’ll get all the information you need to populate EmonCMS so that you can monitor your system and the changes that you make, so that you can optimise it for your home.
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I think a lot of the monitoring kits installed by Octopus were in the early days. We had our install last week and I wasn’t able to even get them to include a Shelly power monitor in the new distribution box.
I didn’t push it but it was explained that photographic evidence of all aspects of the install must be taken and each install is audited on these.
Octopus uses its own monitoring system, so a Shelly device would not be necessary.
They didn’t install any monitoring on our Daikin. So we added the Shelly after the install was complete and combined that with a P1P2MQTT module to gain realtime access to the Daikins own flow temps and flow rate.
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We’ve had our survey results, which gave a heat loss of 4.1kW. Octopus are proposing a 4kW Daikin and a 250L cylinder. They say we need 7 rad swaps, plus we’re going to replace 2 rads in the kitchen/diner with a single K2 vertical as we’re adding some additional kitchen units which requires removing a radiator. Only pre-obligation is for me to remove some ceiling in diner and utility to allow primary pipe work to be run more internally for efficiency and aesthetics. Total cost will be £400. Rad swap in the utility looks pointless though for the sake of 4W!
I asked about 6kW Daikin, but was told that 4kW is fine up to 4.7kW heat loss. I am happy that with a heat loss of 4.1kW at an outdoor temp of -2.2, and room temps of 21 (we only heat to 18-19), that we will be fine. I currently run our gas boiler at 45° flow which gives a return of 40° and heats the house just fine. All TRVs and lock shields fully open. I am therefore confident that with some larger rads I can get down towards 40° flow and SCOP of at least 3.5.
Any thoughts on this? Thanks
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I would be pushing for a larger capacity Daikin (or Cosy 6) and offer to pay the difference in cost. Remember all Daikin under 8kw are software limited 8kw, so seems no point in having slower reaponce and less flexible.
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Would cover a possible future extension then too:)
Octopus do not install any monitoring for the HP. They installed a emonscms monitor only when I had complained for a year about the HP. I thought they would be monitoring this, but, no they stated it was for me to monitor. In fact recently, when I had engineers out, I asked them why do they not look at the data from my system and they had no record of the system installed.
I take it you’re going ahead? As £500 is an absolute steal…!
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