What happens to an electric motor if it has poor or no
ventilation. Will it burn out? If it will, how long it
will run before it burn out?

Answer Posted / john h

This actually is hard to answer because the heat generated
may not actually be surpassing the thermal capacity of the
motor to disapate heat even unvented. If the motor is
producing excess heat which surpasses the operating
specifications of the motor design then it will reduce its
lifespan and fail. It also could be producing excess or
reduced windage (air resistance) reducing the effectiveness
of the motor.

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