Cleanrooms are enclosed, controlled production environments in industrial manufacturing. They protect sensitive components and parts from loss of quality due to dust and dirt. To define a CNC Cleanroom, cleanliness levels are classified according to the number and size of particles per cubic meter of air. Cleanrooms and cleanrooms differ primarily in the definition of the permitted particle sizes. The construction costs of a cleanroom are significantly lower than those of a cleanroom due to the less complex filter and ventilation technology and the operation is cheaper.