Optimal AirCleaning at the Lowest Cost Per CFM

Portable
At 138 pounds this exceptionally maneuverable upright unit is a much more user-friendly upgrade from larger and heavier negative air machines.  Built-in portability features include a convenient transport dolly that enables one person to tilt back the PAS1800 and move it almost effortlessly and noiselessly through the facility.  The portability features also provide the ability to turn the unit "on a dime" in tight spaces, roll it easily up or down stairs and protect against floor damage.
Powerful
The two-speed 1.75 horsepower motor enables the PAS1800 to produce much higher airflow (1,800 cfm at high speed & 1,000 cfm at low speed) than any other product of it's size.  
Efficient & Economical
The PAS1800 comes equipped with two filter stages.  A third stage is optional, and filter change indicator lamps eliminate the guesswork about when to replace filters.  Because the filters are economically designed to hold more contaminants and last longer, users can save hundreds or thousands of dollars a year in replacement filter costs.