1, characteristics: ① environmental protection: no electricity, energy efficient continuous operation, no noise, no spark, explosion-proof equipment. ② weatherproof features: between the arc-shaped blades, each blade and blade gap, when the rotating blades each other to fill the seats to fill this gap this, a lot of rain along the section line thrown round, a small amount of rain water along the leaf and slice living on the roof, will not flow into the turbine, the turbine rotates while the air flowing from the blade gap, blocking rainwater from entering. ③ operation device: the high-tech standard of ball bearings, which bearing is completely closed, and never self-lubricating, so that it can rotate at a speed of less than 3.2Km breeze. ④ Dust: turbine exhaust machine is 24 hours non-stop switch, dust easy attachment, even if the need to clean is also very convenient. ⑤ maintenance: rotary exhaust vent no maintenance, no need to replace parts, providing absolute quality, so choose motor turbine fan is the best protection of investors. ⑥ light weight: the turbine exhaust is mounted on the roof of the base even be considered a total weight of about 15Kg / seat, very light, when the load in the design of steel structures, may not need to be considered. ⑦ lighting: the gap between the blade and the blade into the interior light will thus be increased illumination 5-10% electricity savings. ⑧ life: the general life of more than 15 years. 2. Application ① generate air convection, heat the row. ② reduce the indoor temperature, increase the indoor air fresh. ③ reduce the air conditioning load, increase the cooling effect. ④ moisture out of the roof, Mei Qi, the steam and keep the roof dry. ⑤ instead of heavy electric blower, reduce stent costs, save electricity, minus the noise. ⑥ used in factories, warehouses, rooftops of buildings, villas, patio, greenhouse, livestock breeding, and all mine tunnel roof ventilation, ventilation. Note: 1, the general annual average wind speed of 3.4m / s (three wind), indoor and outdoor temperature 5 ℃, such as indoor and outdoor temperature> 5 ℃, may be appropriate to increase the number of installations 2, building height of 6 meters when using effects preferred.