Can the biological safety cabinet of medical device company use 70% exhaust air?

First of all, it should be noted that there are two ways to exhaust the biosafety cabinet: one is A2 (30% is exhausted outside the laboratory and 70% is recycled inside). One is B2 type (100% discharge, discharged outside the laboratory). There is no 70% exhaust as you said. Medical device company, depending on how you use it, what experiment you do and what model you choose, the difference between A2 and B2 is as follows:

A2 is 30% discharge and B2 is 100% discharge.

1 The main difference between A2 safety cabinet and B2 safety cabinet is that the inhaled airflow of A2 safety cabinet is filtered before returning to the room; The inhaled airflow of B2 safety cabinet is filtered and discharged outside.

2. There is not much difference between the two biosafety cabinets in terms of biosafety, because both biosafety cabinets are filtered before exhausting.

3. If your research object may escape radioactive gas or toxic and irritating gas, please choose B2 type safety cabinet, otherwise, you can choose A2 type safety cabinet.

4. If B2 type safety cabinet is selected, please ensure that the laboratory has sufficient ventilation, otherwise it will lead to too low suction wind speed of the safety cabinet, which will cause alarm and seriously reduce its biological safety.

5. If B2 safety cabinet is used in midsummer or severe winter, a large amount of outdoor air will flow into the room, which may lead to overheating or supercooling of the laboratory environment. Please fully consider this situation before choosing the model. The above information is for your reference.