I had an enquiry about running a radiator off a wetback and checked up with a supplier what was involved as I wasn't too technical, being new here.

It seems that is no problem as long as the cylinder has the capacity to service the needs of the household as well as the radiator(s).

You set it up with a circulation pump for the radiator connected to a room thermostat which switches the pump on as required. It is important that the radiator is connected secondarily to the needs of the rest of the house and will only operate when the cylinder is up to temp.

Any plumbers here had experience with this set-up?

Linkback: https://www.plumbers.nz/q-and-a-hot-water-cylinders/44/running-radiators-off-wetbacks/268/