Some people believe it to install the clock on the wall behind the main door, with the assumption that the round or the ticking clock can draw sustenance of Qi or air to flow into the house.
Such beliefs are difficult to explain. The origin of this concept comes from the description Fengsui Symbolic, which uses ticking clock as a symbol of a sustainable life in the house.
The house is often empty or the occupant would go, is feared to be quiet and die, and will improve the quality of Yin / negative energy.
Therefore, the house must be filled by a form of life, and the clock is one of the symbols used in Feng Shui.