Hi, We have an ecodan heatpump that powers underfloor heating and have had endless problems with it keeping the house warm. The underfloor heating is set at 48 degrees, however on cold days the house never gets up to the temperature we have set (19 degrees inside). Looking at the graphs we get fr…

Hi @bazmod , heatpump user of 7 years here, but certainly no expert. We have an old Cornish stone barn which we retrofitted with improved floor, wall and loft insulation plus underfloor throughout. I guess we got lucky with our installer, ours works very efficiently. Looking at your manifold you …

[image] nhp: It will be very interesting to see what your experience with the heat geek guy is and what the solution is. like you I am in a heavily restored old house. unlike you my system seems to work fine so i guess I got lucky with the installer. Your epc looks similar. I have UFH everywher…

[image] justinknight: Hi @bazmod , heatpump user of 7 years here, but certainly no expert. We have an old Cornish stone barn which we retrofitted with improved floor, wall and loft insulation plus underfloor throughout. I guess we got lucky with our installer, ours works very efficiently. Loo…

[image] bazmod: Ah yes this makes sense as the hot water was extremely hot yesterday. I think it heats up to 60 every now again for the legionella prevention. At the moment the hot water runs constantly (its set to 46 which we find comfortable for showers/baths). We should certainly look at turn…

I installed the MHRV mainly to head off any damp issues which might be potentially revealed by the insulation which is 50mm PIR foam on the inside of the 9 inch solid walls. which I did as a DIY project one room at a time. . As I did all the ventilation installation work myself also I have no idea w…

@bazmod A quick, easy experiment - would be to remove all the actuators in the manifold - so all UFH pipe is definitely open, all the time. And see if that causes more heat to get into the house. It would rule out anything like thermostats stuck etc: and give evidence to prove/disprove the assump…

[image] Timbones: Given that the temperature sensor is at the bottom of the tank, it’s totally fine to make this setting a high as possible (I think 15 degrees?). It’s quite possible for the temperature at the bottom of the tank to be below 30 after a shower, yet the top of the tank is still hot…

I see the picture of the UFH manifolds, looks nice. Agree with another commenter about checking that the mixing valve is not limiting the temperature going out to the UHF loops. Generally UFH loops should work good at lower temps. However, UFH loops need to be constructed well to transfer the he…

[image] bazmod: Here is a picture of the manifolds for the UFH. [image] As mentioned elsewhere, the mixing valve limits the temperature of the water into the UFH. What does the temperature gauge read, so what is the UFH set to? Mine runs at about 35°C The TRV (with an external temperture s…

[image] Timbones: legionella cycle runs, and monthly is probably sufficient. There’s an argument for not needing it at all legionella is aerobic bacteria a hotwater tank is anaerobic condition it can not grow in there . if your water comes from a treated municipal source or ground water s…

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