Sunshine brand power fan operation without electricity, air thermodynamic principles, with slight differences for different indoor and outdoor air pressure and temperature, complemented by the natural wind, spherical fluid ventilation in the natural state, the instrument automatically continuous rotation run moment excluded from the indoor air, and a continual inflow of fresh outdoor air. To promote and improve the condition of indoor natural ventilation to speed up the indoor air exchange rate, increasing the liquidity of indoor fresh air to ensure indoor air convection, indoor air is always fresh and healthy fresh air, indoor environmental pollution and respiratory disease prevention, and create a healthy living and working environment. 
 The Liaocheng sun Stainless Steel Co., Ltd. specializing in the production of free power - roof ventilation products, with more than 20 sets of large and medium-sized stamping equipment. With ventilators researchers, more than 160 product models, 200, 300, 400, 500, 600, 680, 800, 880, and all kinds of special-shaped ventilation, has a professional installer. Welcome customers counterparts at home and abroad visit the guide. 
 In recent years, under the joint efforts of the company engineering and technical personnel, factory production of free power - roof ventilation domestic specifications, the largest and most complete variety of manufacturers. 300, 360, 450 is mainly used for residential buildings, the floor of the villa roof ventilation mouth, 500, 600, 680 is mainly used for factory workshop and large public places ventilation exhaust. Full stainless steel body, cast aluminum support a special double-sealed bearings. The products sell all over the surface of the country, first class after-sales service.