Window Guide · Mumbai
South-facing Bedroom
South is an acceptable secondary Vastu placement for a bedroom. Window design tunes to Mumbai's warm-humid climate.
The recommendation
These figures are advisory — drawn from IS 3792 (Warm-Humid zone) and Vastu Shastra teaching tradition. An architect should adapt them to your plot's exact bearing, plinth height and facade design.
Why this direction for a bedroom?
Like the master, secondary bedrooms need cross-ventilation, controlled light, and visual privacy. For children's rooms, a south-facing study desk under the window works well; for guests, a small mid-sill window is sufficient.
Discipline, storage, mass. The heaviest face — anchor with weight, not lightness.
Vastu's ideal placement for a bedroom is W, NW. South is an acceptable secondary band.
Why Mumbai's climate matters
Mumbai is in the Warm-Humid climate zone (Aw, Am, Af per the Köppen scale; Warm-Humid per NBC 2016). Summer temperatures: 30-38°C, winters: 18-28°C. Rainfall: 1000-3000 mm/year. Humidity: >70%.
Verandahs are not decoration here — they are the building's lungs. Skip them and the house cannot breathe in monsoon.
For a south face in this climate, the recommendation is a sliding 2t (cross-ventilation) window with clear glazing and a sill at 3' — calibrated for year-round high humidity, moderate temperatures, and monsoon-driven cross-ventilation.
Common mistakes
- Bunk beds beneath a low window — falls through glass risk
- Bedroom window directly opening into a neighbour's kitchen view
- Air-conditioner installed in the only ventilation window
- Treating it as an air-conditioning problem — in Mumbai's humidity, cross-ventilation across opposite walls always beats sealed AC reliance.