Geese are a species kept on the litter in the outdoor system, i.e. they freely use the outdoors at certain times of the day. In recent years, we have been strugling with the problem of avian influenza and one of the recommendations of the Chief Veterinary Officer is to close flocks of geese in facilities without acces to paddocks to limit contact with wild birds that may be a vector of virus transmission. The ventilation systems currently used in goose houses are no longer efficient and cannot cope with air exchange, which worsen the microclimatic conditions (too much humidity and too high concetration of harmful gases ammonia, hydrogen sulphide and carbon dioxide), and thus reduces the well-being of the birds staying in it. The prototype of a high-efficiency, reversible, diffused ventilation system, planned for development, execution and testing, will be installed in the reconstructed building of the goose farm in Kołuda Wielka, where reproductive geese (laying eggs for hatching) will be kept. The new ventilation system will improve the quality of the air that the birds will breathe, which will result in better health (less deaths), will also have a positive effect on productivity (greater number of eggs laid) and positively on the egg itself (better biological value - we will get more healthy goslings). It should be noted that appropriate microclimate indicators (temperature, humidity, air movement, concetration of harmful gases hydrogen sulphide, carbon dioxide, ammonia) affect the productivity or health of the herd. In order to obtain the appropriate levels of these indicators, efficient ventilation is necessary.
