Widely used in places such as hotels, sports centers, schools, restaurants, cinemas, auditoriums, high-end residential buildings, and industrial and mining enterprises for fire protection and ventilation. It can also be matched with central air conditioning systems and environmental purification systems. The external type of motor is used for fire ventilation, while the internal type of motor is used for ventilation. Transporting air and other non self igniting, harmless to human body, non corrosive gases, with no viscous substances allowed in the gas, and containing no more than dust and hard particles150mg/m3When performing ventilation, the intake temperature should not exceed80℃.