THE BIOAIR PLUS 1800 CFM MODEL COVERS 2000 SQ. FT. IS A MULTI-PURPOSE MACHINE THAT CAN OPERATE AS A STANDALONE NEGATIVE PRESSURE MACHINE A STANDALONE AIR SCRUBBER OR A COMBINATION OF BOTH. IT CAN SIMULTANEOUSLY CLEAN AND PURIFY ROOM AIR WHILE CREATING A NEGATIVE PRESSURE TO PULL IN OUTSIDE FRESH AIR. DUAL UV LIGHTS ARE HOUSED INSIDE THE UNIT WITH REFLECTIVE INSULATION TO CREATE MORE LIGHT ANGLES .