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Hutla P., Petráková B., Kára J., 2013. Experimental model of ammonia elimination by ozone in the air. Res. Agr. Eng., 59: 39-45.Experimental device was created to model stable atmosphere. Th e device consists of the glass vessel fi lled with air. Volume of the vessel is 30 litres. Th e ammonia concentration is similar to stable air. Amount of ozone in 2.4 mg was added and subsequently weight loss of ammonia was measured. Measurements were performed at diff erent temperatures (20°C, 45°C) and diff erent air humidity. Th e observed ratio of reacting ozone and ammonia is 5.2:1. It was also found, that this ratio is practically independent of temperature and relative humidity that occur in a stable environment. Th e results are the basis for the design of ozone air purifi cation technology.