In Feng Shui, there are five elements which need to be considered in order to bring equilibrium in building. Theory of Feng Shui is immensely influenced by these five elements which have to be balanced in surrounding.
Chi is the positive energy in Feng Shui that prevails around the cosmos and renders peace, prosperity and harmony to residing inmates if Chi is not blocked. It flows everywhere constantly symbolizing life, harmony, contentment, health and wealth that makes people happy and prosper.
Vastu and Feng Shui, both the ancient arts allows following some basic principles in order to live in harmony and to maintain stability. Vastu is thus older than Feng Shui and the basic theory of this ancient Indian philosophy is art of placement.