Is it normal for the fumigator to turn on with the sound of the exhaust fan?

Normal. According to the query related information shows that the function of reducing the internal temperature of the steamer due to fan rotation, the running time is 20 minutes, 20 minutes will automatically stop. Chinese medicine fumigation instrument, also known as directional drug penetration instrument, Chinese medicine heat fog treatment instrument, directional drug penetration instrument is a practical new type of Chinese medicine fumigation comprehensive treatment instrument, also known as Chinese medicine fumigation instrument.