we're about to install electric resistance UFH in a small area (washrooms) ... and haven't bought the sensor or controller to go with the wire ... the idea being that timed intervals should be sufficient - ie: Cortex decides when appropriate (presence, button-press, time of day, whatever) & switches it on for maybe ten or twenty minutes (enough to heat, whilst leaving some margin relative to the don't exceed time) ...

any thoughts, anyone done this, by any chance ??