The type of Feng Shui that is referenced when discussing situations such as metal bed frames, placement of beds, seating, or desks in relation to doorways, staircases that face the front door, locations of toilets in the home, houses built in cud-de-sacs and at the center of T-intersections, placement of the building in relation to mountains, and bodies of water; these are aspects of physical Feng Shui, which is compatible and studied in conjunction with Classical Chinese Feng Shui. This study cannot be performed without taking the magnetic measurements, and it is impossible to know if the house will have good Chi without knowing the birth year of the occupant, and the year that the house was built.
In Eastern philosophy, people, according to birth year, and therefore a specific triagram, fall into one of two categories; East House, and West House. Buildings that are seated in the directions of N,S, E, & SE are East House and suitable for people who have those triagrams. Buildings that are seated in the directions of W,SW,NE & NW are West House, and suitable for people that have these triagrams. The year that the building was completed with roof, determines what 20 year cycle the house is in, and this also affects the occupants. To complicate things further, there is an annual cycle that changes on February 4th-5th of each year, not abruply but gradually, like the change of the seasons, and this need to be taken into account. Simply put, without a compass, it's not Feng Shui. Without this, you cannot determine the alignment of your building with the earth's magnetic fields, which is what makes it work. You can't just arbitrarily count off to nine and expect results. What reference does this counting off have to anything? It doesn't take into account the basic force of gravity. I don't buy it.
Feng Shui is a deep and complex science that take many years to master. It uses observations and repeatable complex calculations, and is based on study of the physical environment inside and outside the building, rather than a metaphysical reading relying on inspiration or intuition.