In the case can not change the size of the existing outlet, the number of cases, but need to increase the indoor ventilation to improve the cleanliness of the method should be used?

To increase indoor ventilation to improve cleanliness According to customer requirements (initial resistance, surface wind speed, rated air flow) and other related data to determine the filter width, height, depth, etc., can not change the size of the existing outlet, the number , Can increase the filter thickness, for example: 610 * 610 * 120 can be used as 610 * 610 * 292 type filter.