Generally, it will not affect Feng Shui. There are 24 directions of Feng Shui, which are called Twenty-four Mountains, but most people only know eight directions, such as due east, southeast and south. It is difficult to locate the house without a compass. For example, if you say that your house faces south, there are three mountains, C, D and V, and the nine planets flying over each mountain will be different. Moreover, each mountain is divided into 15 degrees, the middle 9 degrees is divination, and the left and right 3 degrees are divination. There is no correct mountain direction, so it can only be unconstrained.
It is best to use a compass to orient. The simpler way is to buy a better compass with a degree, and then consult after determining the direction of sitting.
Good luck at six o'clock! ! Amitabha! !