Micro climatic conditions within the livestock facility are affected by various factors such as ventilation,
cooling, heating, insulation and latent and sensible heat generation from animals. In this study, numerical BES method
was used to simulate energy flow inside the poultry house. Based on the BES method and THI concept, degree of
thermal stress of poultry was evaluated according to the locations in South Korea. Comparison of THI values within
the poultry house was also carried out according to the stocking densities to reflect recent animal-welfare issue.
Significant decrease in thermal stress of poultry was observed when the stocking density of 30 kg/m2 was applied
in the change of the seasons(p<0.05) however, there was no statistically significant difference in summer
season(p>0.05). It meant that installation of proper cooling system is urgently needed. For Iksan city of Jeollabuk-do
province, total 252 hours of profit for thermal stress was found according to decrease in the stocking density.