The 7th Street restaurant is located on the ground floor of a six-story building located at ul. Siedmiogrodzka 1 in Warsaw. The most common difficulty faced by owners of buildings with catering establishments is the penetration of odors from the restaurant into other areas of the building - in this case, the living areas. The lingering odor is bothersome to tenants who report the problem to the administration. Energy Air used AEROSEAL® technology to perform the necessary analysis and diagnosis of the problem, as a result of which the 7th Street restaurant managed to seal the exhaust shaft from the kitchen hood. Leaks have been reduced by 93.3%, the installation meets tightness class C standards, and the problem of unpleasant odors has been eliminated.