HeartFan Ventilation Systems Co.,Ltd. is a company who specializes manufacturing ventilation systems for the animal husbandry,agricultural and industrial market.HeartFan fan products,cooling system and relative spare parts are distributed in over 20 cities in China,and have a reputation for high quality and superior performance. With offices located in Xiamen China,has been in business for 10 years becoming a leader in animal husbandry,ag