◆Patented Design: Internal and external cover use radiation surface reinforcement design, elegant appearance, reduce vibration and noise, improve the heat dissipation performance.

◆H80-H400 frame size, all series have oil hole and oil drainage hole, inner oil seal, IP55 protection degree design.

◆Ambient temperature of 280 degree, the reliable operation is 1 hour, the ambient temperature of 250 degree, reliable operation are 2 hours.

◆Widely used in tunnels, hotels, high-rise apartments and other places as ventilation and smoke exhaust device.