1. Regular annual testing of clean air volume, as well as other environmental parameters, in the determination of the efficiency of the test at the same time.
In this case,
2. The main detection of wind speed, the final resistance and leakage rate.
In this case,
3. When the high-efficiency air filter air volume decreased to 75% of the rated air flow need to replace the high efficiency.
In this case,
4. When the final resistance of the initial resistance of 2 times need to be replaced.
In this case,
5. When the wind speed is lower than 0.35m / s need to be replaced
In this case,
6.DOPpao other companies can not test the project can be tested outside.
