A ductless fume hood is a laboratory equipment that uses a filtration technology to capture and transform harmful gases generated inside the cabinet, and then circulate the purified air back to the laboratory environment. This equipment has the advantages of no need for ductwork, energy saving, and reducing environmental impact. The ductless fume hood complies with international standards, including France AFNOR NFX 15-211:2009 and USA SEFA 9, and has been tested according to CE electrical safety specifications before leaving the factory. The equipment also has a monitoring and alarm system, which can effectively ensure the safety of the operators. The ductless fume hood is widely applicable to various laboratory environments, such as constant temperature and humidity rooms, clean rooms, chemical laboratories, etc.