I really wanted to like this. It's just what I hoped for. Something that can tell me when I should open the window to let some fresh air in, and something that can tell me that the afternoon pollution is too foul that I am better off just leaving the windows closed. I bought several for myself since the first generation, and even bought one as a gift to my mother.
It wasn't until I decided I should put them side by side to see how the first edition stacks up with the second that I realized that the readings are ALL OVER THE PLACE! I've noticed that the 1st generation consistently rated indoor pollution and dust much worse than the 2nd generation, even though the 2nd generation was supposed to be more sensitive. I couldn't even get the temperature to line up.
I went to their website hoping I could call tech support to see if there is an update to firmware I could download only to realize they don't even have a phone number listed. I have to fill out a form and wait for someone to contact me back. Days later, I finally got a message that tells me they "calibrated" my units. As far as I could tell, they just made sure all of the units under my account that have the same name, like "Master Bedroom" or "Kids' Room" show the same reading. However, if I put a "Master bedroom" unit next to a "Kids Room" unit, the readings are still vastly different. I know for sure my chemical and dust level are incorrect with at least two of my machines because it's sitting in a room which I never open the window but is dust piled because it's carpeted and is my dog's favorite room to hang out. They told me that I have to wait a few days for the data to normalize. When I did wait for it, nothing changed. Now, i've gone past Amazon's return period because i waited for Awair's website to reply and waited for the readings to normalize.
I really want this to be a fluke because I really wanted a device like this to work. But I can't think of any reason why these readings would be so off from each other, and that they can "calibrate it" so that machines with similar room names would end up having similar readings.
Update: 1/23/19 Several months later and after many back and forth, I finally got to speak with a real human beyond email. They had sent me a replacement 2nd edition some time ago, but the chemical and dust reading is still suspiciously low. After today's call, they said they will send a replacement 1st and another replacement 2nd edition. I'll update my findings. My feeling is that their 1st edition is overly sensitive or dust can accumulate so it read more dusty over time. However, it does work, and shows fluctuations. I think their 2nd edition is trash with useless dust sensor and chemical sensor that is not sensitive enough.
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