This is a replacement filter for my room air filter machine.

We really like our vorando but the filters are not cheap at Bed Bath and Beyond. I found this one at a good price on Amazon. The vendor was great and got it out quickly. It works great scrubbing the air and clears out a room as quick as a few hours. If you have allergies this is a very helpful product. These filters are high quality removing allergins and all the dust in the air. I definitely recommend this filter and vendor and the price.

I have used these filters for years. I use the Vornado because my husband smokes and I do not. I cannot believe how much they clean out of the air. I just wish they didn't cost quite so much.
I will add that for smokers these filters do not last as long. 6 months max for heavy smokers. But I feel better since I am not breathing all that tar into my lungs.

I own an old Amway air treatment system, a very old one but high quality. It's worked for some 20 years, literally. Was top of the line when purchased. All filters are now discontinued. This filter was the closest I found to the size. I lined the top and sides with latex and "door" weatherstripping to manage the gaps. It seems to be working well. I also put a vornado pre-filter on the side where the air intake is and reused the old Amway carbon filter (the old Amway utilized a HEPA and a carbon together; I'd love to replace it too but I can't figure out how to accomplish that). My makeshift combo seems to filter almost as well as before for only $80.00 total cost (including the weatherstripping). The Amway filters were about $200 a year. So I came out ahead and resurrected a decent device. I believe, based on my experience, that I might just be willing to purchase the whole vornado system, but, for now, this seems just fine.

May 2017: I upgraded to 5 stars from my original 4. While my makeshift system might not be approved by vornado company, I personally have been pleased with results and longevity and certainly, for what I want and am getting, the price. HOWEVER, I have also reviewed the totally unrelated Mammoth brand filter and system highly. I am still living in an environment (old dusty house) and room size (500 plus square feet) that defies small filters and yet, the filters I am using seem to help. I recently tested the mammoth system by using it alone and am pleased by its ability to clean even 500 square feet (small system and inexpensive filters). The air movement is better than the old Amway. If you buy the whole Vornado system, read other reviews for air movement and room size. My situation is unique. I am only rating the filter itself and was pleased with its performance for an extended period of time.

...but it does the job. I still think the AQS35 is the best air filter them have ever made. Complaints about AQS35 noise has only led Vornado to create lower capacity and therefore more silent filters like the AC500 which I also have.