FENGSHUI
Five Elements
space
Basically, man lives in an infinite space. All the other four elements are in space. Brahamasthana in Vaastu denotes a space element called either or Aakash. Its main quality is vibration (Shabda)/word and it governs all the communication between the universe. It has to be in abundance.
Air
Air is the second important element. It is necessary for life sustenance and is called Prana Vayu in Indian Yogic tradition. Air is the element of the northwest direction, the Vayavya direction. The proper Airflow is a must for survival and progress. Touch is its element and Saturn is considered lord for its proper function.
FIRE
Fire(Tejas) tattva gives heat and light. Its main element is Sight. Lord Sun is the prime source of heat and light on the earth. The right amount of heat/light is the first precondition for all living things.
WATER
Out of the five main elements, water(JAL) tattva is a very important & scarce element. Moon and Venus are the watery planets in astrology. The Northeast sector or Ishaan direction is considered best for underground water. Water is available in many forms and most essential in all functioning of life.
Earth
Earth is another important element for creation. All forms & creation is possible because of the earth. The southwest direction belongs to the element of earth.