Cross-ventilation
Air moving through a room because it has two openings on different sides — an inlet and an outlet. A room that breathes feels larger and, in India, stays liveable through heat and humidity. One opening alone barely stirs the air.
Inlet + outlet = through-draught
Two modest windows on opposite walls beat one huge window every time. Where a second window isn't possible, a louvered door or a ventilator gives the air somewhere to leave.