FIELD: construction.SUBSTANCE: group of inventions relates to a system of ventilation ducts, providing to minimise air pollution in a livestock building and/or around it. The system is located at least partially at least under one surface for keeping animals and comprises means for receiving waste. The system comprises the first air duct with a first inlet end and an outlet end opposite to the first one, and at least one first ventilation opening for communicating with at least with the means for receiving waste. The system further comprises the second air duct with a second inlet end and a second outlet end, and at least one second vent for communication with at least the means for receiving waste. A method of reducing air pollution in the construction includes ensuring the availability of the system of ventilation ducts, creating the second air stream and the second air pressure in the second duct, creating a curtain of air flow across the waste receiving means. Using the method and system for removal of ammonia in air over the surface for keeping of animals. The system is used in the livestock building, made with minimum total distance for general transport of animals measured for a cycle of development from birth to death and/or from insemination to insemination.EFFECT: ensured retention of ammonia concentration on the floor and in cesspools, improving indoor air quality.53 cl, 12 dwgГруппа изобретений относится к системе вентиляционных каналов, обеспечивающей сведение к минимуму загрязнение воздуха в животноводческой постройке и/или вокруг нее. Система расположена по меньшей мере частично под по меньшей мере одной поверхностью для содержания животных и содержит принимающее отходы средство. Система содержит первый воздуховод с первым впускным концом и противоположным первым выпускным концом, и по меньшей мере одно первое вентиляционное отверстие для сообщения по меньшей мере с принимающим отходы средством. Система дополнительно содержит второй воздуховод со вт
