XPOWER X-2700 Professional 3-Stage HEPA Air Scrubber, 1/2 HP, 550 CFMDesigned with the unique needs of professional restoration, contractors, and other cleaning professionals, the XPOWER X 2700 3 Stage Professional HEPA filtered air purifier gives you maximum options with 5 speeds and 550 CFM airflow capacity. Advanced digital controls for speed settings, a timer function, and a PM2. 5 air quality meter make it the most user friendly, easy to set up air scrubber on the market, and the timer makes off hours operation a