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yes, a few years ago, i bought a blueair 211+, which has a hepa and activated charcoal filter, and felt a noticeable improvement in my coughing and sneezing rig

yes, a few years ago, i bought a blueair 211+, which has a hepa and activated charcoal filter, and felt a noticeable improvement in my coughing and sneezing right away (and since then). the 211+ performed the best on wirecutter's own tests, but wasn't the top recommendation for what seemed like arbitrary reasons. you change the filter twice a year for about $100 in yearly costs. i hvae some air leakage around doors and windows (old building), but it's not enough to overwhelm the 211+ (as noted by my air quality sensor). in fact, i'm ok with some external air exchange, because CO2 levels can otherwise get unacceptably high overnight.

guitarbill 7y ago
they do explain quite well why they picked what they did, and the blueair 211+ is their upgrade pick for bigger rooms. at least they publish their test methodology and results, so you you can make up your own mind based on the data. good to hear it's made such a difference for you. i've never considered getting an air purifier, but living in a city, maybe i should.
- clairity 7y ago
  sorry, i should have added that the review snub was a few years ago when i was researching my purchase options. but yes, they have since added the 211+ as an "also great" recommendation. i think the main (dubious) issue before was that they doubted the longevity of the high air purification levels they saw and so didn't want to give it a recommendation at the time.
stordoff 7y ago
> because CO2 levels can otherwise get unacceptably high overnight I got a CO2 sensor recently, and I'm surprised how much of a difference small changes can make. One of my rooms was hitting 1600-1800ppm overnight (which as I understand it is not a problem per se but not great) with the door open about 2in/5cm - leaving the internal door open an extra 6in/15cm or so means it rarely goes above about 700ppm (generally hovers around 600). I'm also surprised at how quickly it'll go up - that same room will go from 800ppm to 1600ppm with the door shut in well under an hour.

guitarbill 7y ago

they do explain quite well why they picked what they did, and the blueair 211+ is their upgrade pick for bigger rooms. at least they publish their test methodology and results, so you you can make up your own mind based on the data. good to hear it's made such a difference for you. i've never considered getting an air purifier, but living in a city, maybe i should.

clairity 7y ago
sorry, i should have added that the review snub was a few years ago when i was researching my purchase options. but yes, they have since added the 211+ as an "also great" recommendation. i think the main (dubious) issue before was that they doubted the longevity of the high air purification levels they saw and so didn't want to give it a recommendation at the time.

stordoff 7y ago

> because CO2 levels can otherwise get unacceptably high overnight I got a CO2 sensor recently, and I'm surprised how much of a difference small changes can make. One of my rooms was hitting 1600-1800ppm overnight (which as I understand it is not a problem per se but not great) with the door open about 2in/5cm - leaving the internal door open an extra 6in/15cm or so means it rarely goes above about 700ppm (generally hovers around 600). I'm also surprised at how quickly it'll go up - that same room will go from 800ppm to 1600ppm with the door shut in well under an hour.