Abstract
The electric dust collectors are ventilation equipment of the road tunnel. It is general that the air recycle system is set up in the by-pass tunnel. This time, the side installation type air recycle system was adopted for the first time. This is a method which uses a part of the section where the tunnel was widened and sets up. This paper is a report which the side installation type air recycle system confirmed that the general type is equal to the processing performance and the pressure performance.