You can find your air purifier model on the bottom of the device.
Original Replacement Filter for Purifiers 800&900 Series AC0950, AC0951, AC0830,
Philips Original Replacement Filter for 800 & 900 Series AC0819, AC0820, AC0920,
Philips Original Replacement Filter for Air Purifier 600 Series AC0650, AC0651,
Original Replacement Filter for Air Purifier 600 Series AC0650, AC0651, HEPA Nan
Air Purifier Replacement Filter 4in1 for Air Purifier AP001 | HEPA Original Replacement Filter, High-Efficiency Activated Carbon, Black
Original Water Filter for Humidifier Air Purifier Combo Turonic PH950
