Under the conditions of rated air volume, the filter needs to be replaced in 3-4 months;

Or when the resistance of the filter reaches more than 400Pa, the filter must be replaced;

If the filter uses washable filter material, the filter material under replacement can be washed with water or a solution containing neutral detergent, cool and dry, and then replaced; A maximum of two cleaning times is allowed, that is, a new filter must be replaced;

If the dust concentration in the use environment is large, this service life cycle will also be reduced.