What must all doors be kept as while a facility is in operation if located in a residence?

In a facility located in a residence, it is essential for all doors to be kept closed while the facility is in operation. This practice plays a critical role in maintaining safety and sanitation standards. Keeping doors closed helps to prevent unauthorized access, which is crucial for the security of residents and staff. It also aids in containing any potential hazards within specific areas, such as areas where food is prepared or where sensitive operations take place.

Additionally, closed doors contribute to environmental control, keeping out contaminants, pests, and unwanted noise that could compromise the sanitary conditions of the facility. This practice is especially important in a residential setting, where the risk of cross-contamination can be heightened. Thus, ensuring doors are kept closed supports overall safety and hygiene within the facility.