Thanks lyndon: I think we're on different bathrooms this particular one has no
other doorway than the grate where the lighter coloured tiles are. You arrive in this room through a vent so ther is no way of dragging chairs in.
----------------
¦ ¦
¦ --------
¦ vent ¦
¦ tile ¦
---------IIIII----
grate
The vent in question sends you back to a different location than from where you entered it needing lots of work to get back: