Product review (4 stars): Does the trick
These carbon filters go with AKDY hoods. You use them IF you aren't going to hook the hood up to an actual bent and exhaust. If you have a vent out you do not need these. They work well and I have had it for months and it's still doing the trick. My only complaint is that it is difficult to change the filters but that is more the actual hood issue and not the filters.