Vastu is an integral architectural concept. Since millennia, houses, temples, and even whole cities are built by this concept in India. Their bases are the natural laws of spatial energy, and this knowledge is used to bring the living space in resonance with nature and its inhabitants. The house is like man's second body. It is a lens focussing the natural environmental influences. The living space's quality influences the health of man as well as his mental and emotional status.  

The old Indian geomancy Vastu has been shaped into a scientific system after millennia of experience and observation, and with it you can find out the effects of environmental influences on man.  

By this are meant especially those influential factors you do not think of  at first that they could in any way influence your health, for example  Earth's magnetic field, the subtle energies from Earth and Sun, the paths of  Sun and Moon as well as gravitation. All those influences define, taken together, the quality of the room you are living in. You can view the room as a bio-field which interacts with the bio-energetic field of the human body. 

These interactions underlie laws of nature which are taken in respect when building a house in Vastu style. The Indian scientist A. R. Hari did an investigation on this and found out that most chronic diseases are a reflection of the living situation. If the natural laws of spatial energy are violated, the manifestation of chronic diseases seems to be furthered, while a strong bioenergetic living field strengthens the power of resistance of its inhabitants. 

If the science of Vastu is applied to the climatic and cultural living conditions of contemporary Europe, it is called Vasati, the modern form of Vastu.

The influences taken into account by Vastu are of a very subtle nature, but its effects may have a strong influence on the life of the inhabitants of the house. Space, the most subtle of all elements, is called ether in the Vedic teaching of the elements. According to the Vedas and as confirmed by modern physics, space is a very complex energetic structure filled with inner patterns and relations.

The external space in which we live is closely connected to the inner space of our consciousness. Constantly we project our consciousness into the space surrounding us and in the other way around external space influences our mind with a lasting effect. The energies of space can be directed by geometric symbols placed at certain parts of the room. Such graphic tools are called yantras in Sanskrit. On the one hand, one can expand one's consciousness by using them as objects for meditation, on the other hand they always also have an energetic component. To make best use of this component it is necessary to place them at a suitable location from where they can best form the energies of a room. Each room has certain key points, just like every living being has chakras and acupuncture points which are very useful to effectively influence its energies. These key points can be determined by a specialist. But the yantras still have an effect, even if these points cannot be established exactly.

In general, yantras consist of a multitude of geometric elements and symbol representing different energies. They can also be combined with written words or mantras.

There is a variety of different ways to apply yantras: You may put them up on the wall of a room as a piece of art. Then they have an effect on the whole room, influencing the energies of the room in relation to its usage and its inhabitants.

To enhance certain bodily functions or to balance the subtle energies of the body yantras may also be fixed under the bed so that they can directly exert their effect on the body. Even to individual organs and to specific diseases yantras can be assigned.

Working directly with the Vastupurusha Mandala is another very effective possibility. This yantra symbolises the perfect living space whose energies are in harmony and totally balanced. The head of the Vastupurusha is directed towards the northeast. It is best to use this yantra to affix it to the certain points of the plan of a house.