Our HDT EMAT-3T Bio Filter/ECU integrates patented HEPA filtration technology with high-quality HVAC equipment to create a single portable unit. The EMAT-3T creates negative pressure for medical isolation, and uses HEPA filtration and ultraviolet germicidal irradiation to capture, contain and neutralize biological contaminants from inside the shelter. The EMAT-3T also introduces clean, comfortable air into the shelter, even in harsh weather conditions. The HDT EMAT-3T system exceeds CDC guidelines for air changes when utilized with an isolation area of the appropriate size.