2nd Zone UFH and 2nd pump

[davesparks]

Ok stand corrected then.

However, all the UFH systems I've worked on, come as kit to add to existing CH systems. Unless your talking of a bespoke UFH system, for large premises. Bit like the place I work in now, which has a large circulating flow & return, and the manifold takes its blend from that.

Most domestic ones I've done these days do seem to be the kit type. Thinking about it it is a few years since I've seen it done directly from the circulating pump just like any radiator zone.