I’ve got a 9kW Daikin system, installed by Octopus. With the help of members here, I’m monitoring it using ESPAltherma and a CT connected to a MyEnergi Eddi. The data is logged to Home Assistant and published to emoncms and heatpumpmonitor: https://heatpumpmonitor.org/system/view?id=120 The house …

Heatpumps live and die based on system volume and flow rate. If you have a buffer then the volume should be ok but if it is just a volumiser then you need to make sure you have maximum flow rates. Personally ditch the tado and run on LWT or the madoka, loose all the TRV’s and use the lockshields …

I’m trying to ditch Tado. Unfortunately, Octopus are dragging their heals replacing it. No TRV’s and the system is fully open and balanced. I’ve already found out that the HP is a little bit oversized. My HL was 10.5 - however, I believe it’s actually 9.5 or slightly lower. I don’t think I gain an…

For the living room, wouldn’t more emitter area/output be preferable to a higher flow temperature?

We have UFH in that room - I’m not sure I want to rip up our floor again! So I’m going to go down the route of improving the insulation… The flow rate to that room has always been a bit problematic since we got the HP - I think we get a max of between 2 and just shy of 2.5 on the flow meter…

For ditching the tado you should be able to go into the installer menu and select madoka or LWT and then configure a weather curve to match. Regarding UFH the main UFH pipework will usually be plastic but ideally you want a nice big bore to the manifold and to have no additional pump or blending va…

I have the same problem (EDLA09 in a house with 9 kW heat loss at -8°C, located in Belgium) and learned allot on this forum, particularly on this topic. I also have this 900-1100 Watt minimum consumption which gives me a bad COP (max 3). I discovered also the heatpumpmonitoring site. There is one …

Hi Geert, The data for that heat pump is not reliable, there are times when it is using less than 500w of electricity and it even produces heat whilst using no electricity whatsoever. This 9kW heat pump uses about 880w as a minimum and usually a little more.

Thanks Matt. By the way, thank you for your detailed reporting of your experiences with the EDLA09. I have just experienced the same learning process this winter and it is very pleasant to see this confirmed. Many people have tried to convince me that lowering the supply temperature is the solution…

Hi Geert, Yes, you are correct, the minimum electricity consumption is the limit with all heat pumps, and with this one it is quite high compared to the maximum output. Apart from this it is a nice heat pump. Be careful looking at data from non MID monitored systems, it is too easy to make adjust…

It is a nice heat pump. When it is colder than 7°C and it is not too humid, I am quite satisfied. To be sure, I asked my installer whether a swap to an EDLA08 is a possibility, but I think this will cost me more than the yearly benefits over 20 years…