Abstract: A painting plant comprising a painting booth through which articles are conveyed to be painted, an air conditioning device by which the air to be fed into the painting booth is conditioned in temperature and humidity, and cleaning means for cleaning the air having passed through the painting booth is further provided with recirculating means which feeds the air having been cleaned by the cleaning means to the air conditioning device for reuse, thereby achieving energy saving.

Abstract: A painting booth through which a conveyor passes to transfer articles such as automobile bodies to be painted. The booth comprises spraying spaces each with a paint spraying machine disposed therein, buffer spaces adjoining the respective spraying spaces and a duct arranged to blow air into each spraying space. To minimize power and heat expenses for operation of the booth, each buffer space has a cross-sectional area smaller than the cross-sectional area of each spraying space. The buffer spaces may be provided with no forcible ventilation. Alternatively, the booth may comprise another duct to blow air into at least one of the buffer spaces through air inlets arranged such that air flows in the buffer space towards an adjoining spraying space at a velocity lower than the velocity of a flow of air in the spraying space.