"A study of the environmental control practices and problems for poultry was conducted in Riyadh area of Saudi Arabia ...The result from Ibrhaim's study indicated that summer ventilation rates were between 0.80-1.51 air exchanges per minute, and between 0.31-0.46 air exchanges per minute for winter. It was predicted that ventilation rates during summer could control moisture and ammonia in all farms ..." (Quoted from paper)