A stove facing a water position?

[Cecil Lee]

In Feng Shui, in situations where:
1. A stove directly faces (opposite) a water position.
Often, a small mirror is placed at the water position, such that when one lits up the hob, the mirror can "reflect" back the "fire".
2. This is also for a stove facing an open window. A small mirror is placed at the level / hob, to reflect back the "warmth".
3. Some FS practitioners also advise placing a mirror at the back of the stove. Do guess what is this for?
Warmest Regards,
Cecil