"John Stumbles" wrote in message
...
pauliepie wrote:
Is it possible to have the heating circuit off a combi split into 2
zones, one for a ground floor the other for upstairs.
If so, what controls are required, etc,etc?

2 * 2-port valves etc, but you'll also need a bypass (e.g. pressure
relief bypass) so when the last valve turns off and tells the boiler to
stop theres somewhere for water to go while the boiler keeps the pump
running as it cools down

That is only if there are rad valves on all rads. If the rads do not have
rad valves there is no need for it, unless the maker states one for heat
dissipation reasons.



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