The RydAiR Electrostatic Air Cleaner (EAC) , DM 450N , DM450-HUB and DM 900N -DC are self contained commercial unit designed for use in Offices, Conference Rooms, Pantry Areas, Gymnasiums, Medical Facilities and all other Indoor Facilities where better Indoor Air Quality is appreciated . It is a fact that "Sick Building Syndrome" exists in many commercial buildings and having a good and reliable air filtration system is a major step towrads improving the quality of indoor air. This in turn creates a healthy working environment for employees, reduces the spread of infectious ailments resulting in lesser sick leave and increased productivity. These models are equipped with a prefilter and Ionizing & Collection Cell(s) or Hepa Filter to remove large and fine particulates respectively. A UVC lamp kills airborne microbes in the air stream. BPI (Bi Polar Ionisation) and PCO (Photocaylytic Oxidization) further enhance performance in mitigating airborne & surface viral aerosal inclduding COVID-19. Bi-polar Ionization produces positve and negative ions, whilst the PCO produces hydrogen peroxide (H2O2) killing airborne microbes in the air stream as well as disinfecting surfaces in the facility. The DM 450 N , DM450-HUB and DM 900N DC are designed to flush mounted to false ceilings or simply suspended from the true ceiling in the facility.