Reducing UFH temperature

[AlanB1976]

Hi all
I've recently installed underfloor heating and having LVT tiles installed soon. All the tiles note that the UFH should not exceed 27 degrees C. However, the flow temperature of the system will be higher than that. I know that the heat still needs to get through the screed/latex which will absorb some heat but I'm worried that it may still cause problems. I originally thought that the manifold for the UFH had some means of mixing in cold water to regulate the UFH temperature but I see I was wrong. Is there a way of limiting heat, apart from just restricting the flow? I don't think restricting would help much as it would just mean the start of the coil would get high temperatures but the end not as more is lost through the pipework with the slower transfer, but still result in issues at the start. Am I not getting something or is there a way of making sure I can keep the temperatures lower?
Top half of house are radiators so don't think I can run whole system at such a low temperature.
Thanks
Alan

 

[Johntheo5]

What is the primary heat source, gas or oil fired boiler or a Heat Pump?.

 

[AlanB1976]

Heat pump

 

[Johntheo5]

The only way to regulate the flow temperature then is to reduce the Heat pump outlet temperature,
Reducing the flow through the UFH manifold loops will result in a lower loop outlet temperature which means the mean loop temperature will reduce which may be enough to satisfy your requirements, If the minimum loop outlet temp is 20C, then the HP outlet temp must be 34C/35C to give that mean temperature of 27C, (34+20)/2., but this could bring its own problems in uneven floor heating as most UFH loops operate at a dT of ~ 8C but this would mean reducing the HP temp still further to 31C and increasing the flowrate to give a dT of 8C, mean temp is then still, (31+23)/2, 27C, but will/should give more even floor heating.