the air circulation in the clean room is taped up, (or it was last time i saw it)
the second problem is the elbow for the laser cutter has still not been done as their has been no decision yet on how we will protect it , either the windchimes go up or something else.
otherwise if the wind is in the right direction the fumes from the laser cutter can be drawn into the intake of the circulation and then pumped back into the space