Blue Pure 311i Max Replacement Filter Compatible with Blue Pure 311i Max Air Pu-rifi-er, 3-in-1 High-Efficiency and Activated Carbon Filter, Part#Blue Pure F3MAX,(Not for 311i+ max)

These filters fit and work fine in my Blueair 311 Auto air purifier. Easy to install and a good value. Saved some money by using these instead of the name brand.

Nothing is overly exciting about HEPA air filters. What I can say is that these filters seem to be identical to the original filter that was on the device. That is always a good thing. They work equally as well as the original. You can't go wrong with these filters.

Easy to install and fits well. The price is better on here than through the manufacturer.

Love these filters. Very easy to put on and take off.

THIS IS A SCAM. DO NOT BUY. I bought this when I first bought my purifier, and now I’m outside the window to return.It does not fit. I compared it to the old filter, and it’s completely different dimensions.

Very satisfied with this product. Use it in our 400sf great room with much success. We just changed the filter after about 8 months (should have done it a month or so ago!) and everything was thick with dust and grime. Had to handwash the pre filter (outer) as it seems a bit fragile, but it came clean without incident. Now that we realize how hard it is working, we will change the filter next time after 6 months. I highly recommend this product for cleaning the air in a larger room!

I have bad allergies and this appears to work the same as the name brand but at a lower price!

Can’t say to much as I just got the unit brand new and it already came with a filter. To be continued.