Our company produces many kinds of the centrifugal fan, the axial-flow fan, the roof ventilator, diagonal fan, smoke exhaust fan, the tunnel air blower, the spheroidal wind hat. blower cases and serial productses. Its characteristic: The efficiency is high, the noise is low, the energy consumption are few, the anticorrosion is durable, service convenience and so on. Widely uses in the ventilation systems of guesthouse, office building, market, test chamber, hospital, exhibition hall, tunnel, thermal power plant or factory. The thermostable performance is fine, the air blower test meets the GB/T13274-91 which is fire prevention standard test criteria requirement,. It continuous running 20 hours in the high temperature condition without damage. easy installation and occupies a few area.