SHARING OPTIONS: Picture 1: A typical opening measuring 15ft 9in by 4ft 6in requires 15 louvres and will cost about €180 plus VAT. Shed ventilation has a major influence on animal performance, with inadequate ventilation frequently raised as being an underlying contributor to significant health issues. Monaghan man Noel Lennon says a relatively new louvre system can provide enhanced airflow into sheds and could be the answer to cutting down on health issues and improving animal performance. It is recommended that the system be installed in such a way that there is a continuous 10mm opening between each louvre. A safe edge on the top and bottom of the louvre prevents rainfall from entering the shed when installed at this spacing.