We're in the process of having an extension built, which is getting underfloor heating within it. As part of the work, we've got the chance to separate the heating into 3 zones, upstairs Rads, downstairs Rads, and the underfloor area. We also have a hot water cylinder.
I've drawn a simplified diagram of what I think the layout will end up like here - https://pastebin.com/DNMzvuic
I'm fairly happy that I've got the boiler picked as an Intergas Compact HRE 40 SB.
Valves will be Honeywell V4043s.
And a Nest Thermostat to control each zone.
I've been looking at pumps to try and work out what would be needed there. I currently have a Grundfos UPS2 15-50/60 but don't know if this would be suitable for the new setup. Could someone advise on this? if not, which of the Grundfos pumps should I be looking at?