The primary function of a ventilation system is to ensure indoor comfort by continuously supplying fresh air and maintaining key indoor parameters, such as temperature, humidity, and carbon dioxide concentration. One of the critical factors affecting human thermal comfort is air velocity, which depends on the type of supply ventilation devices and the volumetric flow rate of the supplied air. Diffusers available on the market differ in air discharge shapes, adjustability, and airflow resistance. This study analyzes the airflow distribution in a ventilation system equipped with fabric ducts acting as ceiling-mounted diffusers. Two types of fabric diffusers, identical in length but differing in the size of the outflow openings, were tested at different airflow volume rates. Experimental studies were conducted under laboratory conditions using the thermoanemometry method. High-accuracy thermoanemometers were positioned within a measurement grid, determined by preliminary smoke tests. The collected data were used to create velocity field graphs and airflow range diagrams for a limiting velocity of 0.20 m/s in the selected measurement plane, considering various volumetric flow rates. The study aims to assess the airflow characteristics in rooms equipped with fabric diffusers of different designs