Let’s discuss how to distinguish between blowers and exhaust fans
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How can one distinguish between a blower and an exhaust fan? Can it be determined just by looking at their appearance? What are the specific differences? It seems to be about the right length.
You can tell they’re different just by their names: one is for giving, the other for drawing
The blower is used for combustion, to increase the oxygen supply and provide combustion aids, while the exhaust fan is used to remove waste gases and allow fresh air to enter
The blower is relatively small, while the impeller of the exhaust fan is relatively large
The blower inlet supplies air to the equipment, while the exhaust fan transfers the medium from one device to another
The exhaust fan draws smoke out from the outlet of the heating furnace, while the blower supplies air to the heating furnace through the air valves. The blower is used to ensure forced ventilation in the heating furnace; I have never seen a setup where an exhaust fan is used alone. Fan installations typically include devices for the preheating and recovery of flue gas; their structural design is basically similar. The main difference lies in the varying temperatures of the medium, which has an impact on their operation. During startup, it is necessary to fully open the outlet and close the inlet – this is a characteristic of fans, as it results in the lowest starting current.
The blower will be equipped with a suction device, covered by a hood to protect it from rain; it should also have noise-damping capabilities
Classified by function, another point is that the bearing housings of flue gas exhaust fans generally have cooling water