What is the ideal window size for a west-facing master bedroom in Delhi?

Vastu and composite climate together suggest a window approximately 2.5 feet wide with a sill height of 3.5 feet on a west face for a master bedroom in Delhi. Type: Fixed + Vent (top hopper). Glazing: clear.

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

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

Why does Delhi's composite climate need clear glazing?

Delhi sits in the Composite climate zone (Hot summers, cold winters, monsoon — the climate where classical Vastu was calibrated.). For composite climates, clear glazing balances solar gain, heat retention, and visibility — Operable windows matter more than fixed ones. The same opening that bleeds heat in January welcomes it back in July.

Window Guide · Delhi

West-facing Master Bedroom

West is an acceptable secondary Vastu placement for a master bedroom. Window design tunes to Delhi's composite climate.

CompositeDelhiVarun · Prithvi (Earth)

The recommendation

Width

2.5'

~76 cm

Sill Height

3.5'

high sill — measured from finished floor

Type

Fixed + Vent (top hopper)

Glazing

clear

Single 6 mm

Overhang / chajja

2.5'

Minimum projection above the window

WWR

15–20%

Total window-to-wall ratio for the room

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

Varunवरुण

Children, gains, dining. The afternoon-light direction — manage with shading.

Vastu's ideal placement for a master bedroom is SW. West is an acceptable secondary band.

Why Delhi's climate matters

Delhi is in the Composite climate zone (Cwa, Cfa per the Köppen scale; Composite per NBC 2016). Summer temperatures: 35-48°C, winters: 2-15°C. Rainfall: 500-1200 mm/year. Humidity: 20-90% (seasonal).

Operable windows matter more than fixed ones. The same opening that bleeds heat in January welcomes it back in July.

For a west face in this climate, the recommendation is a fixed + vent (top hopper) window with clear glazing and a sill at 3.5' — calibrated for hot summers, cold winters, and seasonal monsoon.

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