BlueairBlue Pure 311 Genuine Replacement Filter, Particle and Activated Carbon, fits Blue Pure 311 Air Purifier (Non-Auto)

For all of us having issues with Amazon suggesting the incorrect filter size, this is the shorter filter and fits the 311, non-auto. The NON-AUTO is the keyword. I bought the suggested size by Amazon and they were too tall. So if you bought this one and it’s too short, make sure you get one not non-auto. Hope this helps as Amazon did NOT help (nor did the manufacturer making this so confusing)

This is the perfect filter for the BlueAir Pure 311 air purifier. It does NOT fit the 311 Auto. Blueair’s website details how to determine which machine you have based on height. 311 is 18.5” tall and 311 Auto is 20.5” tall. This filter works for 311 and is the original manufacturer product. Measure your machine to make sure you buy the correct one.

It is hard to get support! I try to send them an email, but when you click on the email sign, it does bring you anywhere.. Very disappointed!

I bought the wrong filter as this one was rated poorly and didn’t show up in the top results.This is the replacement I was looking for my unit and has no issues whatsoever.

The air filter I received was 2 inches too short to use in the BlueAir 311 auto device. I’ve ordered it before from this listing and had no issues but my latest one had to be returned as it’s not compatible. The short filter I received doesn’t even match the size description in this posting I bought it from.I suspect I was sent the filter version for the non-auto device even though I ordered the auto version.

This filter does not work with the BlueAir 311 that has only the "top light" as one of the photos shows, but with a different, smaller version. This filter is about 4" too short for my unit.

Had to cut the filter to fit proper height. It was hard to cut, difficult to replace.

I've replaced it ... It was a waste of money!!