Facing the dark floored room, turn 180 degrees, and walk through the doorway you're standing in towards the lighter colored floor. Straight ahead of you is a table with two pots on it, to the left is a doorway where the floor becomes dark grey again, walk towards that dark grey floor, facing into that room you'll see a few white chairs, turn to your left, you'll see a hallway that goes farther. Back on the light colored floor, with a vent on the right wall, walk right to that vent, once you're standing to, just behind the vent on the right, a thermostat on the left and a bathroom with an open door on your left. Stopping there, you're done.