Facing East or North are most suitable for stove. Kitchen main tips are given bellow;
1) Kitchen should be South East corner in a flat/house.
2) The door of kitchen towards North and East side.
3) Stove should be keep in South West direction.
4) Slab of cooking room beside Northern and Eastern wall side.
5) Refrigerator place is South West corner.
6) Stove heater should be East South corner.
If all above articles are proper place than stoves facing South and North is good. And it is not harmful.