Filter Box 6 inches with Efficient Box Fan Filter, Duct Filter Box for Fresh Air Intake and Improved Airflow, HVAC Filter Box for Family, Factory, Minerals, Planting Tents

I decided to go with this one over the ac infinity, because it is an inch bigger on filter size and it's 2 filters vs 1. I liked the idea of those 2 features, but with practically no reviews I hesitantly bought it to try. Glad I did, it's built very well, not much bigger in width than a 10 inch carbon filter, but much shorter. Packaged extremely well, and showed up in perfect condition. The included filters work great and I get high flow with exceptional filtration, the gasket material on the perimeter of the filter frames makes sure that all air is going through the filter material and not sneaking around the filters. The only issue with it, and I knew this before buying, was the filters are a somewhat odd size. They are available in store, from big box stores where I'm at, but not in the merv ratings as the originals, but you can order this size, in the full range of merv ratings online everywhere, so not very hard to get. You should get some weather striping and fashion some sort of gasket, taking your filter choices' exact measurements in mind, if going the DIY route. The other option is, the manufacturer offers filter replacements, a bit pricey, but they are built very well and ready to drop in. One thing to note, the collars on either end, are the exact same size as an Ac infinity (and most other brands) fan. So you can't just mate the 2 together like you can with a carbon filter, you will need to use either an anti vibration style duct clamp, or some ducting to connect them together. Over all very happy with this filter box, so much so I bought another 8 inch version as well, as soon as I opened the box on this 10 inch one. While I have never seen an Ac infinity version, I'd say you can't go wrong with this one, and just might be better for the reasons why I chose it to begin with.

I was impressed with the cutting edge technology used in this filter. The activated carbon filter effectively removes odors, fumes, and harmful chemicals from the air, it's a must have product, a sturdy filter at an affordable price, it's a high quality filter, it's a very effective filtering model

Unfortunately the box has a 6” duct on one side, and 4” on the other 🤦‍♂️ At the time of writing this, all images and dimensions show 6” ducts on both ends. The physical unit I received has a 6” inlet but only 4” outlet. Very frustrating