A
bout Vastu
The Vastu Purusha Mandala is an indispensable part of vastu shastra and constitutes the mathematical and diagrammatic basis for generating design. It is the metaphysical plan of a building that incorporates the coursly bodies and supernatural forces. Purusha refers to energy, power, soul or cosmic man. Mandala is the generic name for any plan or chart which symbolically represents the cosmos.
In Hindu cosmology or in Vedic Cosmology the surface of the earth is represented as a sphere and not as a flat surface, "Cakracasah parinaham prthivya" It says "people who reside on the surface of earth circumference" [Rig veda 1.33.8]. However in context of the earth as a home or resident it is represented as four-cornered in reference to the horizon's relationship with sunrise and sunset, the North and South direction. It is called Chaturbhuji (four cornered) and represented in the form of the Prithvi Mandala. The astrological charts or horoscopes also represent in a square plan the positions of the sun, moon, planets and zodiac constellations with reference to a specific person's place and time of birth.
The legend of the Vastu Purusha is related thus. Once a formless being blocked the heaven from the earth and Brahma with many other gods trapped him to the ground. This incident is depicted graphically in the Vastu Purusha Mandala with portions allocated hierarchically to each deity based on their contributions and positions. Brahma occupied the central portion – the Brahmasthana- and other gods were distributed around in a concentric pattern. There are 45 gods in all including 32 outer deities.

North- Kubera- Ruled by lord of wealth (Finance)

South- Yama- Ruled by lord of death – Yama (Damaging)

East- Indra- Ruled by the solar deity- Aditya (Seeing the world)

West- Varuna- Ruled by lord of water (Physical)

Northeast {Eshanya} – Ruled by Shiva

Southeast- Agni- Ruled by the fire deity – agni (Energy Generating)

Northwest- Vayu- ruled by the god of winds (Advertisement)

SOUTHWEST- Pitru/Nairutya, NIRUTHI- Ruled by ancestors (History)

Center- BRAHMA- Ruled by the creator of the universe (Desire)

The Vastu Purusha is the presiding deity of any site. Usually he is depicted as lying on it with the head in the northeast and legs in the southwest but he keeps changing position throughout the year.
Vastu shastra prescribes desirable characteristics for sites and buildings based on flow of energy called Vaastu Purusha. The morning sun is considered especially beneficial and purifying however the sun does not play a specific role in the Vaastu shastras. In fact it is not mentioned in the texts. None of the heavenly bodies are mentioned in the Vaastu Shastras hence they are not considered in the proper application of Vaastu principles.
Energy is primarily considered as emanating from the center of the building. Many people believe that it comes from the North East corner but in fact it comes from the Brahmasthan or center of the building. It originates from subtle earth energy called Vaastu Purusha and subtle cosmic energy (Unified Field) called Vastu Purusha which meet in the center of the building and then spread outward in all directions. these two energies unite and form the five elements which then distribute in the four corner zones. (see Fabric of The Universe: The Origins, Implications, and Applications of Vastu Science and Vaastu Technology)
While many people think that "Vaastu energy" is emanating from the North East, that is a misunderstanding. People also attempt to equate the energy of the house with the planets. That is another misconception. Vaastu energy emanates from the central part of the house (Brahmasthan) and not from the east. (Pranava Veda and Vaastu Shastras). This energy is a mixture of Vaastu energy, which is subtle energy from the earth, and Vastu energy which is subtle energy from Consciousness itself. Many assumptions are made about Vaastu Science that are completely untrue. From these assumptions people have made up ways to "correct vaastu" by selling yantras, crystals etc. for that purpose. This is completely innapropriate as there is nowhere in the Vaastu Shastras that indicates that any of these devices can correct faulty Vaastu