In new  development air-condition outdoor connection duct,copper pipe which is packaged by thermal insulation material and drainage channel are installed in the PVC ,then they are installed in outer wall. Not only may it avoid the air-condition duct bending during installation process,causes to the neatness and artistic of the installation, moreover the thermal insulation material has the protection of PVC tube. This will enhance its service life.

air-condition outdoor connection duct