The Negative Air Pressure Purifiers are designed specifically for infection control. It prevents the spreading of contaminants and viruses such as the Corona Virus. It can be used almost anywhere, but mostly in Hospitals, medical facilities, and Biological laboratories. The ARDC-2501 Maintains negative pressure in a hospital room that can accommodate 1~6 patients (max. 46.2 square m. based on -2.5Pa and 12ACH) Applications: 1) Protect medical workers of infectious diseases and viruses 2) Prevent airborne cross-contamination risk 3) Reinforce existing contamination treatment facility 4) Create a safer environment free of viruses and infections Features: 5) Meets the high standard of CDC and KCDC (Korean Center for Disease Control and Prevention) 6) High-performance BLDC motor (semi-permanent): level control from 0-100 7) Filtration: 3 filters (pre, medium, HEPA filter) 8) Can be used as a Negative pressure machine only.