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What should I pay attention to when buying the primary filter in the clean air conditioning unit

1. The height of the new air outlet should be no less than 2.5m from the ground.

2. The horizontal direction of the new air outlet should be more than 10m away from the air outlet, and the vertical direction should be below 2m from the air outlet. The new air outlet on the roof should be more than 1m higher than the roof.

3. The new air outlet should have rainproof measures, and valves should be installed in the new air outlet, which can be closed during shutdown.

4. In order to reduce the entrapment of debris, the wind speed of the fresh air outlet should not be greater than 5m/s, and 3-4m/s is appropriate.

5. The fresh air filter device should be installed in the fresh air outlet, and there should be no horizontal pipes before. The fresh air outlet should be directly facing the outside, and cannot be opened in the machine room, ceiling or corridor.

6. The fresh air filter device should at least include: filter screen, primary filter, medium efficiency filter.

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