The ventilator is applicable to an area (1) which is provided with fresh air intake openings (3) at ceiling with suitable distance. A double pit (4) is provided of which the upper surface is turned to vehicle part.
Another opening (5) is provided at upper surface of double pit. A ventilating hole (6) is provided in between double pit. An exhaust port (10) is provided with an exhaust fan (11) at vicinity which blows out the exhaust gases to outside.
ADVANTAGE -Exhausts gases like Co2, CO which is heavier than air, easily. Facilitates safe functioning due to presence of intake part.