Mariana - jsuHShNkletFq (Saturday, March 10, 2012)
Rating The Features: and Product Discription do not list the correct Honeywell air claneer model numbers that use this filter. Here is the Replacement Filter Table on the box of the HRF-11. The first number is the Air Purifier series followed by the # of filters required in parenthesis. The last, right number is for the HEPA filter model # it replaces:10500 (2) 2050010590 (1) 2059017000 (2) 2050050100 (1) 20590As another reviewer has already noted, this is not really a permanent' filter because it must be replaced every 3-5 years under normal use, just like the non-permanent filter that originally came with the air claneer. I'm giving it 4 stars for two reasons: 1. Because I really do not find a difference in the way this works yet compared to the filter that came with my 17000 and 2. My machine requires two of these so the air actually goes through less HEPA material than the one-piece filter that came with the machine [casing and spacer where HEPA material would be if a one piece filter]. Only time will tell if I have to replace this sooner than I would for a one piece filter (yearly) due to it's usage in a room with a wood stove.