Ventilation Flow in Pig Houses measured and calculated by Carbon Dioxide, Moisture and Heat Balance Equations

A good agreement between measured and calculated ventilation flow was obtained on a 24-h basis (coefficient of determination R2 between 0·92 and 0·97) and on an hourly basis (R2 between 0·83 and 0·92). The study indicates that the agreement between measured and estimated ventilation flow on an hourly basis can be improved by taking into account the diurnal variation in CO2, moisture and heat production.