What does a window do, and why should it open outward?
A door is placed by pada, but a window does not work on the surface current: currents are dense near the ground and lighter higher up, so positive energy stays higher, which makes ventilation a must. Windows and ventilators bring in clean air and push the negativity of the house out, so they should open outward, while the main door opens inward; sliding windows are acceptable. Keep windows in even numbers, two-shuttered if possible, in one row at one level, with a window beside the main door; open all windows in the morning and keep the left (Chandra swar) window open during the day.
Related questions
Which element do curtains represent?
Curtains represent the air element: they move only when air comes in. The main door, every door and every window also represent the air element.
Why are main doors made with two shutters?
The two shutters correspond to the Ida and Pingala nadis: we breathe through one nostril and then the other, each flowing for about an hour, so a door with two shutters brings energy in and lets it out easily, while a single shutter struggles to do both. Doors thousands of years old, and even the small room doors of old palaces, were always made with two shutters. The main door must have two shutters; inner doors should preferably have two as well, though one shutter is acceptable there.
In a flat no window has been made at the door. What can be done?
No problem. As taught in interior vastu, make one symbolically, and if that is not possible, make a figure (picture) of it.
In the main door picture, which were the jharokhas and which were the niches (aale)?
The small niches were made for lamps; they are the eyes of the door, and lamps placed in them open its eyes. The jharokhas beside them are the ears. Lamps must be lit in the niches on festivals such as Diwali, Dussehra, Holi and Raksha Bandhan, and in royal houses they were lit daily; a house whose eyes stay open keeps a right watch over everyone. If a door, even one in a wrong place, is decorated like this with small desi cow ghee lamps in the niches, its defects do not apply.
In the seven sea-salt lump usara of the main door, are the rounds made clockwise or anti-clockwise?
Clockwise only. Standing outside the main door, circle the hand holding the seven lumps clockwise in front of the door for the rounds, then sweep once or twice from the front as if pouring the energy out and throwing it away outside. Do it only while the right nostril (Surya swar) is active; done in the left swar it gives no result and instead invites negativity. Swar vigyan is the base of everything, and without swar, vastu is handicapped.
Is a glass panel fixed above the door for light included in the door height for aay?
No. The chaukhat is the four-piece frame, and a window or glass above it is not counted in the door aay, because fixed glass stays closed; glass that opens and closes would be counted. Fixed glass above a door is itself used as a remedy.