The Broan BPSF36 is a Non-Ducted Filter set for 36-Inch Allure range hoods. Features Clean Sense charcoal with indicator. Fits series QS1, QS2, QS3, WS1, WS2, WS3. No one provides more ways to improve indoor air quality. From the spot ventilation and heating products, to our whole-house Broan Fresh Air Systems, trust Broan to keep your home safe and comfortable. Broan filters are made from the highest quality materials to provide the longest life possible and keep your range hood operating at peak performance. Broan also provides replacement filters for many other brands.