Aipujidian Company 
 Small workshops from the past to today's annual output of tens of thousands of ventilators and a set of storage shelves line industrial company, the company developed the Ampelair series without power roof ventilation system that uses a high-quality Japanese NSK bearings and the U.S. PEER, Full of natural ventilation to ensure reliable operation of durable, flexible angle structure of the ventilation device to meet the roof is less than 32 ° tilted surface of the installation. The company has a skilled team of design manufacturing, in particular, the turbine exhaust ventilation combined with years of experience in manufacturing ventilators, exhaust ventilation and continuing to explore the theory of aerodynamics, developed aipu large diameter 880 without power natural ventilation, by domestic large and medium-sized enterprises of all ages to become the industry leader in ventilation, but also to make Aipu series of ventilators, a well-known brands in the industry. Without power consumption, substantial savings for the enterprise spending, good ventilation and dust removal effect, is the first choice of green products business. 
 Aipu series of non-powered fan is the use of natural principles of natural air convection, any parallel to the direction of air flow into a bottom-up speed and vertical air flow to improve indoor ventilation effect of a device, it does not power , no impatient sound, long-term operation to remove indoor heat, moisture and bad smell, Aipu Series fans come out naturally without power, thus breaking the traditional ideas, traditional power exhaust fan installed in the wall, unable to effectively improve the current large steel plant wide air environment, the traditional fan on the surrounding range of 2 to 3 meters have a demonstrable effect, Aipu new electric fans for its unique roof design, forced ventilation effect by the large and medium-sized enterprises favor, but its high economic costs and subsequent maintenance chores, so that small and medium enterprises looking Ertan only, Aipu series no fan with its unique dynamic nature of economic and practical, efficient energy saving, environmental protection and the associated fan power comparable to the roof, and its According to the air and the air flow principles of natural law, rationalizing set in the roof top of a smooth velocity exhaust heat and polluted indoor air, improve the working environment and protect employee health, increase work efficiency. 
 Zero-cost operating costs, the economic cost of installation, low maintenance cost, high quality energy saving considerable.