Due to some brain dead design back in the 1960s, our thermostat (plus associated physical cabling) is in the worst possible position to actually monitor what the household temperature is.
So in reality, I need a thermostat elsewhere.
But due to the wiring being where it is, the actual "on/off" bit needs to be separate to the sensor/control.
Is there such a beast ?
Alternatively, how easy is it to fit the receiver on/off bit to my combi- boiler (a Vaillant 820) ?