Lennox X8309 Air Filter - High Performance 16x25x5 Size Review

Great filter that should last longer than the standard 90 day mark on most filters but it depends on how often you use your device. It's a little tricky to install, but that's a design flaw by Lennox. It stinks these things are so expensive but they seem to get the job done perfectly and this seems like the cheapest place to find them.

One of our main concerns when replacing the oven was the efficiency and cost of the filter which had to last up to 6 months. This is the exact same filter that came with our oven and the price wasn't as bad as we expected. The filter itself did an excellent job of keeping dust and pollen out of our air ducts, as evidenced by the amount of dust and pollen trapped in the folds. We switched after 6 months but I think we could extend it a few more. The filter was very easy to replace.

My system came with the filter installed. I found this a bit strange so I bought two X6670 box filters that weren't foldable. This was a mistake for two reasons. First, they have 10 folds while the X8309 has 22. I would say the X6670 is a 6 month filter but this is a 1 year filter for the same price. Also, the X6670 is 1/4 inch smaller in height and width. I had to add duct tape to my case to actually seal it. This is not necessary with the plastic box X8309.