Complete ventilation means, there is a proper supply of air and the oxygen levels in the air are at good levels removing dust particles and carbon dioxide from the air whereas incomplete ventilation you have more amounts of dust or carbon dioxide.
A completely ventilated area does not any kind of pungent smells whereas an incomplete ventilation area has different kinds of smells in them
There will be the presence of fungal developments in an incomplete ventilation, whereas compete ventilation is fresh and free from this kind of things.
