For one of the car show room client wants the car delivery section to be air conditioned and it will have exhaust to take out the smoke of the car engine.The location is such that the front will be fully open for the car to exit.Best way to give once through AC which will not be economical and the air from front opening may intrude if the velocity of outside air is more with inrush of dusts out door polutants. The area is around 400 Sq Feet
Please suggest a better way to AC this area economically