Central heating pump size

[mfgs]

I have to install a new heating system in a 3 or 4 story house( weird floor levels ), the boiler is going to be on the top floor. The heating is going to be split into 2 zones and an underfloor heating zone, hot water as well. What would be the best pump for this? Also would zoning it conventionally on 2 ports be the easiest and most effective way?

 

[hammers4spanner]

What I would do is contact grundfoss for e.g tell them the schematic of the job and they size accordingly

 

[Ermintrude]

Nice 32/120

 

[SafeGasInstall]

15/60 on every ch zone will do

 

[missplumb]

magna 3 and zone valves on each individual circuit, set it on auto adapt ad let it sort itself out