Hospitals have become small cities unto themselves. They can include everything from offices spaces, cafeterias. and chapels to more critical areas like patient rooms, operating rooms, pharmacy mixing rooms for drugs, and intensive care units. Maintaining direction airflow control and active particle control over all the bacteria, particles, viruses and debris that may be moving between these spaces while also maintain tight temperature and humidity control is the true challenge of this market. Filtration, control and monitoring of these environments is of top concern and these product applications and has been a major focus for AAP for the past 30+ years.