Hi 4space,
even though Marie does not label the combination 4 7 as star - there is still energy. Number 4 is wood and number 7 is metal and as metal controls wood there is tension between these two energies. This tension can be cured. The usual cure is still water.
The number 7 is negative. The combination 7 1 is best when it's activated by a small fountain.
If you don't use a room then you don't tap into this energy. So if you don't want to activate certain energies then don't use the room if possible. If you must use this room then cure the energy combination.
Feng Shui is only activated if a person taps into the energy.
