Quick question, I'm in the middle of chasing out holes making way for an underfloor heating thermostat. There really isn't room to have an FCU on the same part of the wall where the thermostat is going to go due to there being light switches next to it. My question is does the FCU have to be within a certain distance of the stat? Is putting it on the other side of the wall (within another room) at floor level acceptable?