nathan656

I'm not a builder but yes I think it's 40mm The house is semi detached 4 bedroom, new insulation on first floor joists and roof. Wouldn't expect a more than normal amount of heat loss. Boiler is a Vaillant ecoTEC plus 630. Interestingly, the stand alone thermometer in the dining room is getting even lower readings. The house is not cold, but not the cosy temperature we would like. Looking at the pictures of our UH, would this be called wide pipe spacing ?

See attached pics of our pipe. Is this how it's supposed to look? I don't know as there is no temperature gauge for the return, but they don't feel hot to the touch. Correct, three UH zones linked to ONE thermostat which is in the hallway. Can you recommend any smart wireless thermostats?

Hello all, First-time poster here, we have a wet underfloor heating system on the ground floor with laminate on top of screed. We have a Vaillant condensing boiler. We prefer our house warm, leaving the thermostat at constant 22.5 degrees Celsius throughout winter. We're in London and the UH performs well in moderate temperatures. However, when it drops below 5 degrees Celsius outside, the system will run continuously, with the thermostat reading room temperature of 21.5 Celsius without ever reaching the set temperature. I've ensured all settings at the manifold are correct, with a flow temperature of 58 degrees Celsius going into the loops (yes I know that is high), max power setting on the pump, and flow rates slightly over 2 litres per minute. We have a Heatmiser thermostat, and using the app I can see continuous running between 11pm-4am in colder weather. The thermostat is located in the downstairs hallway due to an open plan layout, and moving it would be challenging as it is hardwired. I tried lowering the set temperature at night, which stopped the continuous running, but then it would take around 6 hours of continuous running to get back to 22.5 in the morning, so nothing gained. In summary, during temperature drops, the UH lacks power to meet demand, causing extended warm-up times. Could the proximity of the thermostat to front door be causing a false reading, or perhaps I need to increase the already high flow temperature? Any insights would be greatly appreciated.