Yes I'd say it was a secondary return for sure, how big is your property?
you may or may not need/req it, try turning it off and see how you get on without it
Yes I'd say it was a secondary return for sure, how big is your property?
you may or may not need/req it, try turning it off and see how you get on without it
Thanks so just so i am clear, the switch fir the immersion heater is off, but the thermostat in the grey box still controls the heat( from the boiler) and works while the switch is off? Thanks
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