Air movement

Many of my call-outs involve ventilation problems. Quite a few farmers, particularly those with piggery ventilation which is older and needing improvement, are less informed about how air moves inside a building and its importance to profit and pig welfare. When things are explained on the spot and some simple demonstrations done to back up the advice, most remark, “I see now.” A few go on to say, “Why don’t the textbooks explain it like that?” Okay, lets go down a path or two. How