Common knowledge for range hood manufacturers to use range hoods
　　1.When using,the range hood should generally be started 1-2 minutes before turning on the gas stove.It is best to start at high speed,and after starting,the high or low speed can be adjusted according to the size of kitchen smoke.
　　2.The gas stove should be located directly below the range hood for the best smoking effect.
　　3.The range hood should continue to work for 3 minutes or longer after the gas stove is turned off after finishing the meal,ensuring that the room air is renewed.
　　4.When in use,the windows close to the range hood should be tightly closed,and the door should be opened with a slit to prevent significant air convection and timely replenish the air in the kitchen.