Due to the large difference between temperature and grain temperature, the first ventilation time should be selected in the daytime to reduce the difference between grain temperature and temperature and reduce the occurrence of dew condensation.

According to the status of use, fume hood can be divided into integral lower part open type, floor-standing type, two-sided type, three-sided glass type, desktop type, conjoined type, and radioactive experiments and synthetic experiments designed according to different experimental use needs.

Due to the large difference between temperature and grain temperature, the first ventilation time should be selected in the daytime to reduce the difference between grain temperature and temperature and reduce the occurrence of dew condensation.

According to the status of use, fume hood can be divided into integral lower part open type, floor-standing type, two-sided type, three-sided glass type, desktop type, conjoined type, and radioactive experiments and synthetic experiments designed according to different experimental use needs.