The Masovian Specialist Hospital in Radom is located on the outskirts of the city, on an area of ​​20 ha. It is the largest hospital in the southern part of the Masovian Voivodeship, where approximately 38,000 people are treated annually. patients. The hospital administrators diagnosed the noise coming from the installation in one of the operating rooms, which was sealed using AEROSEAL® technology. The sealing included the supply and exhaust installation serving operating room No. 8 from the air handling units to the supply/exhaust air vents, without the sections from the air handling units to the air intake vents. The volume flows of air flowing through the leaks of the tested installations serving operating room No. 8 currently meet the requirements of tightness class C.