Grahmsolutions17 Feb, 2022Business
In this stage, the pre-filter is used. This is the first stage of the filtration procedure which uses the pre-filter. The pre-filter can help in removing major large dust, hair, pollen particles from the air. The second stage of filtration- Usage of HEPA filters- The second stage involves the usage of HEPA filters. This would filter fine dust particles that were unable to get filtered with pre-filter.
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