Hello, is this product the new model of Philips 5000 Series AC5659/10? The performance (up to 3 nm or 0.003 um fine dust) is the same for both products. The activated carbon+HEPA filter is integrated in this model on one. This would be a possible improvement in terms of maintenance/replacement costs if the 1 in 2 filter is not to be changed frequently in practice. Does anyone have more information or experience about this? According to the Philipps website, both filters of the AC5659/10 Series 5000i cost 65+90€; whereas the filter (2 in 1) of the 4236/10 Series 4000i costs 90€. Thanks a lot