Inspection robots have many applications in industry and everyday life. They inspect large structures such as ship holds, oil pipes, or high-voltage power lines. They operate wherever working conditions pose a threat to humans. The inspection robot is designed to detect differences in the environment in which it moves. In addition, its mobility should be adapted to the conditions in the attic. In this work, a successful attempt was made to construct a robot that moves along ventilation pipes with a diameter of 78 mm. First, the design assumptions were determined, specifying, among others, the robot's dimensions, weight, and wheelbase. The ventilation pipe on which the robot is to move was used to determine the mass. The pipe was tested for compressive strength, thus determining the maximum mass of the robot. The simulation studies were confirmed in the ADAMS environment and by finite element calculations. The designed robot was made using 3D printing. Initial tests of the robot showed the possibility of moving along ventilation pipes.