Study of microclimate and ventilation in a fattening pig house

peer reviewedTemperature, relative humidity and air speed were measured during 4 weeks in two compartments of a fattening pig house. Temperature was controlled by automatic regulation of the extractor fan. Average NH3 and CO2 concentrations over a 8-h period were measured 4 times in each compartment at 1-week intervals. In a compartment without pigs, ventilation rate was measured at 8 fan speeds and air speed was measured in 6 pens. Mean temperature was 24C and relative humidity 71%. despite large variations of outside temperature, 95% of the daily variations of inside temperature were <6C and 68% of the hourly variations were <0.5C. More than 90% of the daily variations of relative humidity were