I currently have a system with pumped heating, gravity HW. Heating has TRV on all rads except bathroom (bypass). There are no room therms or cylinder therms.
I intend to add a tank therm and zone valve to give the ability to heat CH only and avoid overheating the tank.
Should the 2 port valve be fitted near the tank or the boiler - and should it be on the flow or return?
Is there such a thing as a RF tank thermostat to prevent the need for a long wiring run?
thanks