Ducting pipe details in AutoCAD 2d, dwg file.

This Architectural Drawing is AutoCAD 2d drawing of Ducting pipe details in AutoCAD 2d, dwg file. Ducts are passages or conduits that are used in ventilation, heating and air conditioning to remove and deliver air. The airflows return air, supply air and exhaust air. Ducts can also deliver ventilation air as part of the air supply.