Review on 🔵 Blueair Blue Pure 211+ Replacement Filter: Particle & Activated Carbon, Fits 211+ & Max Air Purifier by Joshua Mccall

So I ordered a 211+ replacement filter but got 211 which is for an older Blue Air unit. According to the Blue Air website, there are differences in size and features. So you have to be careful what you get. I could send back the wrong filter. UPDATE 5/23/19: Revain customer service rep confirms they are selling 211+. So I ordered again. The box I received had 211 with a "+" sticker on it. I called BlueAir to confirm with UPC and the item that Revain added the "+" sticker to is actually 211+ but is incorrectly advertised Blue Air on the box. A Blueair spokesman said they are aware of the issue. A Blueair spokesman says the 211+ is a collapsible filter while the 211 is not. You have to open the box to see if it folds up. UPC for 211+: 0-689122-009711. Blueair's website lists the 211+ filter as 11 x 13 x 13 inches, but the packaging actually lists it as 11.69 x 11.57 x 11.57 inches. Hope that helps.