Vancouver: Kitchen Exhaust Vent test results in permutations greater than Rubik's Cube 43 quintillion

Rubik's Cube

The puzzle consists of twenty-six unique miniature cubes, also called "cubies" or "cubelets".

Cambridge Gardens is a high-rise building that offers 181 units (cubies or cubelets) and was built in 1989.

Which 1989 planner in Vancouver City Hall came up with the idea of connecting different floors exhaust vents with 2 others higher up?   Are the bathroom vents connected too?  Are the dryer vents connected?

Two towers:  2628 Ash Street, Cambridge Gardens

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Six Vents not Three

In case of an emergency, Vancouver General Hospital is almost right next door.