Thank you for your reply!
So the system is heating correctly, not too sure about maintaining though as ive no idea how much gas usage they take up. Eg over last couple of days here in London it's been anywhere between 9-15 degrees, I'm averaging about 32/33kwh of gas usage based on it being at...
Bought a house where the previous owner had done a lot of work back in 2023. Along with the rear and side fill ground extension, One of the things was fitting a 2 zone ufh downstairs and removing the rads. 1st floor and loft still only have rads. He's also put a wb 8000 35kw life boiler...