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I tested the different loops last week and the two under the timber floor do heat up eventually. Unfortunately there are no CAD drawings, very frustrating that a proper job was not done. What would be the best approach to improve this? Seperate thermostat controlling the actuators for the...

Picture attached - although not a great angle and pipes in front of the manifold which are not part of the heating. Yes it is as you described. 1 stat controlling 2 port valve. No control centre (yet!) The system was put in 2 years ago. I don't believe the suspended area has been warm enough...

Thats really helpful, thank you - I will see if I can contact the installer and check exactly what the setup is. Do you think it would work to setup the two different floor types with two thermostats controlling the actuator valves for the different floor types. i.e. Thermostat 1 controlling...

I have opened the flow at the manifold as much as possible The loops on return are cooler, I have been measuring the return and adjusting the flow to try and get it close to 7 degrees difference on all loops. The last two loops (covering the timber floor) have a difference of less than 10...

Many thanks for the responses tiled floor which is the same across all the underfloor heated area in the 2 circuits both the floor and the room are not warm when closing the first 4 circuits and leaving only the last 2 circuits for the timber floor the heat is only just detectable when...

I have 6 circuits of underfloor heating on one manifold. The first 4 circuits are through a concrete slab the last 2 are under a suspended floor. The first 4 are great, they warm up very quickly, the last 2 do not heat up much at all. In trying to diagnose the problem I have turned off the...