The fundamental design criteria for a laboratory recirculator are essential for biological or chemical applications. These equipment can be air to air or air to liquid, depending on the use that will be given. For air-to-air models, a feedback air recirculation recirculator is required to map direction in laminar flow. Appropriate filter elements are essential to ensure accurate circulation.
On the other hand, air-to-liquid models require optimal flow to obtain effective ventilation. A circulatory system with appropriate filters is necessary to provide the maximum protection against contamination that can be obtained. The number of outlet stations, as well as the amount of ventilation and space in which they operate, should be taken into account. The use of chemical resistant materials with good mechanical resistance is also a factor to be considered when selecting a laboratory recirculator.