Honeywell Air Purifier Enhanced Filter Series is designed to help reduce the most common household odours and VOCs, so you can customize your filtration experience based on your needs. Four (4) options are available in this line: Pet, Smoke, Kitchen, and Home Renovation. This OEM genuine Honeywell HRFSK1V1 Enhanced Kitchen Odour Air Purifier Filter “S” is specially formulated with potassium permanganate and activated carbon to capture and adsorb common kitchen odours. Use of this filter along with the Pre-Filter and HEPA Filter may help reduce most kitchen odours up to 5 times faster (1).