Vastu is an alignment of cosmic forces with five key elements ( Water, Fire, Earth, Space & Wind) of nature.
Vastu is a Vedic system of architecture & design from ancient times recorded in various vastu Puranas. It consists of rules for designing and constructing of the buildings in a systematic manner. Vastu has a very basic concept, that every space has a soul of its own & a flow of the positive energy would exist around it if that soul is harnessed in the right way.
The concept of Vastu shastra revolves around the central space, a brahmasthan & its four main directions i.e east, west, north & south and four sub-directions i.e. north-east, south-east, south-west and north-west. Vastu survives as manuals on design, layout, measurements, ground preparation, surroundings, space planning and also other aspects of architecture.