What is the ideal window size for a south-west-facing master 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 master bedroom in Bengaluru. Type: Sliding 2T. Glazing: clear.

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

Yes — South-West is the ideal Vastu direction for a master bedroom. Nairritya (Prithvi (Earth)) governs this direction, and the room aligns naturally with that energy.

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 Master Bedroom

South-West is the ideal Vastu direction for a master bedroom. temperate climate adds specific window-design choices.

TemperateKarnatakaNairritya · Prithvi (Earth)Vastu: ideal

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 master bedroom?

A master bedroom needs cross-ventilation for sleep quality, controlled morning light (so the room doesn't double as a sunrise alarm), and visual privacy from neighbouring plots. Two windows on perpendicular walls is ideal — one bigger for light, one smaller for airflow.

Nairrityaनैर्ऋत्य

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

Vastu's ideal placement for a master bedroom is SW — South-West sits in this 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

Placing the largest window on the east wall — early sun disturbs sleep cycles
Bed-head against the same wall as the window — drafts and noise reach the sleeper directly
Mirrors directly opposite the bed reflecting the sleeping body