What is the ideal window size for a south-west-facing bedroom in Bengaluru?

Vastu and temperate climate together suggest a window approximately 3 feet wide with a sill height of 3 feet on a south-west face for a bedroom in Bengaluru. Type: Sliding 2T. Glazing: clear.

Is South-West an auspicious direction for a bedroom per Vastu?

South-West is an acceptable secondary placement for a bedroom. The traditional ideal is W, NW, but the room remains usable in South-West with the standard window choices.

Why does Bengaluru's temperate climate need clear glazing?

Bengaluru sits in the Temperate climate zone (Mild year-round. The most forgiving zone — and the most often over-engineered.). For temperate climates, clear glazing balances solar gain, heat retention, and visibility — A Bangalore wall does not need to be a Jaipur wall. Most builders copy the same envelope anyway and the home pays the bill.

Window Guide · Bengaluru

South-West-facing Bedroom

South-West is an acceptable secondary Vastu placement for a bedroom. Window design tunes to Bengaluru's temperate climate.

TemperateKarnatakaNairritya · Prithvi (Earth)

The recommendation

Width

~91 cm

Sill Height

mid sill — measured from finished floor

Type

Sliding 2T

Glazing

clear

Single 6 mm

Overhang / chajja

2.5'

Minimum projection above the window

WWR

20–25%

Total window-to-wall ratio for the room

These figures are advisory — drawn from IS 3792 (Temperate 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.

Nairrityaनैर्ऋत्य

Stillness and stability. Master suite, heavy storage, the home's grounding corner.

Vastu's ideal placement for a bedroom is W, NW. South-West is an acceptable secondary band.

Why Bengaluru's climate matters

Bengaluru is in the Temperate climate zone (Cwb, Cfb per the Köppen scale; Temperate per NBC 2016). Summer temperatures: 25-35°C, winters: 12-22°C. Rainfall: 500-1500 mm/year. Humidity: 40-75%.

A Bangalore wall does not need to be a Jaipur wall. Most builders copy the same envelope anyway and the home pays the bill.

For a south-west face in this climate, the recommendation is a sliding 2t window with clear glazing and a sill at 3' — calibrated for mild year-round temperatures with comfortable airflow.

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