In Vastu Shastra the South-West direction is governed by Nairutya. The heaviest zone — master bedroom, safes and structural mass belong here.
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.