https://www.heatingcontrolsonline.co...set-p-944.html

has a 3 port valve.

As far as I understand, if the UFH is up to temperature, the 3 port
valve will find a position such that 100% of the water flows around teh
UFH circuit and none will be taken or returned to the CH primary circuit?

If that is so, then I don't need to balance the main CH connection to
this - it will self regulate?

Cheers

Tim