According to the biade data,the counterweight of the blade is polished to made the blad rotate maitain balance

Under normal working environment,the motor continuously works for about 6 hours.measure its temperature for 3day.

Under normal working conditions test whether the current of the power cord of the motor meets the standard sfter the motor works for 3-5 hours.

Under normal working environment, the distance from the fan is about 80cm,test the air volume at different positions .

Test of motor pumping speed under normal working environment