Its basic form is an axial flow structure.It adopts a high-temperature resistant motor and is equipped with a special motor cooling system.The product is tested for high temperature resistance by the national fire equipment supervision and quality inspection center in accordance with the GA211-1999 "high temperature test method for fire exhaust fans".At a medium temperature of 280ºC,it runs continuously for more than 60 minutes,and at a temperature of 100ºC,it runs continuously for 20 hours/times without damage.It can be used for ventilation and smoke exhaust.