South facing flat can be good when their main entrance is as given following map :
If the flat main entrance is above mention place than South facing is beneficial for flat owner .
Except the main entrance the internal part of flat should be as follow :
|Pooja place / pooja room ||North East|
|Kitchen||South East |
|Bed Room||North, South , North North East, North North West|
|Toilet||South South West, East South East|