How did the Vastu Purush and the 45 Vastu Devtas originate?
In the Matsya Purana account, a drop of sweat fell from Shiva during his battle with the demon Andhaka and a great being (mahabhoot) arose, so hungry that it could devour the three worlds. On Brahma's order the devtas and asuras pinned it face down and 45 devtas sat on its body. Brahma granted that it would be remembered and given food and water whenever anyone occupies land, and that if it was not fed it could open its third eye and create havoc; he accepted it as his manas putra (mind-born son). The 45 places where the devtas sat became the 45 pads, each with its own function, like the separate work of the eyes, ears, nose and hands; medical science too speaks of 45 departments of the body.
Related questions
About 11 or 12 of the 45 devtas are asuras. Whose energy should be increased and whose kept low to stay balanced?
This was to be explained in detail later, as there is a big confusion about it. Asura devtas are also needed: the day there are no asuras in your house, your work will not run, so the aim is balance, not removing them.
What is the scientific basis behind the Vastu Devtas?
As the sun rises in the East and crosses the sky, and the moon adds its influence, the rays reach each part of the land at particular angles (1 degree, 5.625 degrees, 11.25 degrees) and keep changing the composition and chemistry of each spot. The sun, the moon, the 27 nakshatras and the 9 planets project their energies at particular angles of inclination and transform the soil, which is why the same land has given crops for thousands of years. Every particle has its own energy and chemistry that cannot be destroyed, only transformed; people who trusted religion more than science named these energies devtas.
After placing sweets and later chanting the mantra 27 times at a devta place, I felt strong heat in my body. Why?
It shows a defect or imbalance at that pad. When an offering reaches a defective place the defect tries to come out, as when granite tiles at one devta pad cracked during a group havan, and the body reacts. The uneasiness is a signal: the pad must be purified and activated with the method being taught (havan samagri, bhog samagri, mantra or the samagri to hang), so wait for the full method before trying again.
Are the 32 outer devtas drawn in the Manushya bhoomi or in the Pishach bhoomi?
In the Pishach bhoomi, the outermost band. The 32 outer devta lines are drawn only within the Pishach bhoomi, while the 12 inner devtas sit in the combined Manushya and Dev band and Brahma in the centre.
Are the symbols used in these treatments, such as the swastik, Vedic or newly made?
The symbols are taken from the Vedic tradition, such as the swastik, but they are designed with an added element that generates and spreads their energy, and the material they are engraved on matters. Each piece was to be shown physically in class.
Are there 45 vastu devtas or 49?
There are 45 devtas, but 4 more devtas stand on all four sides to protect them, so basically there are 49. Bhog samagri is offered to these 4 guardians as well, after the 45.