Originally Posted by
DBMandrake
Good point on closed doors vs open doors.
One important factor with zoning is that you only really get the full benefits out of scheduling nearby rooms to different temperatures if you keep the doors CLOSED as much as possible, especially to rooms that are scheduled right off like spare rooms, otherwise they will suck the heat out of the adjacent room and cause that room's radiator to go full blast trying (and possibly failing) to meet it's target. And it can cause very strong draughts as well due to convection between the rooms.
At certain times of the day when doors will be open between certain rooms I try not to schedule them more than about 2 degrees different from the adjacent room. For example in a morning week day when people are constantly moving between living room, hallway, bathroom, kitchen etc to get ready I have most of those rooms scheduled to 19 (except the bathroom on 22) so that one rooms radiator is not trying to heat another room and causing draughts.
Late at night when the living room door is closed most of the time I'll let the hallway drop to 18 while the living room stays at 21, but if I tried to do that earlier in the evening when the door is open and people are passing through a lot you just get a cold draught in the living room.
So try to keep doors closed as much as possible and think about the times when that is not feasible in your scheduling to avoid large temperature differentials between connected rooms when doors will inevitably be left open.