The combination of intensive poultry production and certain environmental factors in poultry houses can sometimes lead to poor indoor air quality and pollutant emissions. Gases present in the indoor air of poultry houses, such as ammonia (NH3), methane (CH4), hydrogen sulfide (H2S), carbon dioxide (CO2) but also dust, are of particular importance given their adverse effects on production performance and poultry health.The gases originate from biodegradation of fecal matter accumulated under anaerobic conditions inside poultry houses. Regular assessment of indoor air quality allows for planning waste disposal and thus ensures clean air for poultry and workers.In today context, all operations carried out to optimize environment in poultry farms are of capital importance to guarantee the welfare and poultry health.