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SPECIAL OFFER FOR SUBSCRIBERS: https://bitrix24public.com/inzhenerny... The problem of draft reversal in ventilation ducts is common. This is especially true for the top floors. In this video, I tried to show the causes and solutions. We are the Turbodeflector company and I am its director, Mikhail Zakharov. On our channel, you can learn about us, our product (Turbodeflector) and ventilation. Personally, I have been dealing with ventilation issues for over 12 years. __ Get a free consultation on ventilation selection: http://www.turbodeflektor.com View production: http://turbodeflektor.ru/about/produc... Customer reviews: http://turbodeflektor.ru/about/reviews Ask a question: [email protected] __ If you liked the video, put LIKE and share with friends: Subscribe to the channel so as not to miss a new video: / @turbodeflektor Free hotline: 8 (800) 700-2460 http://www.turbodeflektor.com