Product review (4 stars): WORKS GREAT
I used these for an Air King stove hood. I attached these to the upper side of a grease only filter (the ones that are all metal) to also filter out smoke etc. They worked well compared to using the "grease only" filters.
If you do this, be certain to put this on TOP of the metal filter. You will then have to prevent it from being sucked into the fan. I accomplished that buy using garbage bag ties. Just strip the metal off, slide the thin metal ties through both the metal and charcoal filter in two places and it prevent the filter from being sucked up and hitting the fan. I then used duct tape around all four corners of the whole thing to make sure all the smoke and odors are being sucked up into the filter. That's was my particular and peculiar situation. As far as the filter itself, YES, it does get rid of a LOT of smoke and odors. One star off for price. Too expensive.