In Vastu Shastra the South direction is governed by Yama. Fame and stability — best kept heavy, with storage and tall furniture.
Vastu works on balance rather than superstition: each of the eight directions carries an element and a natural function, and a room placed against that function creates friction you feel daily — poor sleep, money that never settles, arguments in the kitchen.
Use the free Vastu analyser to check your floor plan direction by direction and get corrections that do not require demolition.