What is the difference between environmental controls and engineering controls ?
“Environmental controls” is a more inclusive term than “engineering controls”. Examples of environmental controls are UVGI, HEPA filters and AII rooms. Examples of engineering controls are local exhaust ventilation (e.g., booths, hoods, and tents) and general ventilation (including directional airflow and negative pressure). • Is an AII room the same as a negative-pressure isolation room? “AII room” is an accepted term and is used in the AIA guidelines that describe the purpose for and details of ventilation of AII rooms. An AII room is a special negative-pressure room for the specific purpose of isolating persons who might have suspected or confirmed infectious TB disease from other parts of the setting. Not all negative-pressure rooms are AII rooms, because they might not have the required air flow or differential pressure of an AII room. • Our TB clinic only treats persons with LTBI. Do we need an AII room and a respiratoryprotection program? Ideally, yes, because persons with LTBI
