“The Best Buy site lists two BlueAir 211+ models. One says it is meant for a 550sqft and priced at $399. The other is meant for 540sqft and is priced at $299. Can you decipher the difference?”
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The difference is the more expensive one is the "Auto" model - it has a setting where it automatically slows down / speeds up based on the air quality of the room. The other main difference is the more expensive one uses less electricity. For these two reasons, I bought the Auto one. But the price difference was only $40-50 at the time so it was an easy choice, especially since the Auto uses less electricity (more efficient motor) so it ends up being cheaper to own over the long run. The energy use for 211+ is 30-61 watts. The 211+ Auto is 4-38 watts. Per the Blueair website.
Sorry, there was a problem. Please try again later.The Blue Pure 211+ Auto is 550 square ft ($339.99) and the 211+ 540 square ft ($299.99). They are the same but one has an auto feature they will adjust automatically to the rooms air if it gets dirty. I would recommend going with the 211+ Auto.
Sorry, there was a problem. Please try again later.The higher priced one detects quality of the air and works accordingly. Very useful feature
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