Excessive ammonia levels within a operation can adversely impact pig performce through altering metalbolic reactions or pig health; as well creating a unfavourable working enivronment for its staff. Three options were examined in the reduction od ammonia levels: (1) dilute the ammonia through higher ventilation rates (2) remove the ammonia before it reaches the pigs (3) eliminate the cause of the ammonia. Ammonia levels were studied in a variety of building designs to assist the reader in experiencing methods of reducing ammonia in different systems.