I bought this product based on Dyson's good reputation and a friend's recommendation. We needed something that not only cleans the air, but also heats it. Unfortunately there is nothing else to do. We bought the product and tried it. We could choose the level of room cleaning in the downloaded app. The app had a great user interface that allowed us to manage various hardware settings. The first observation was that the intelligent system did not allow me to cool or heat in automatic mode with the fan speed I chose. It chose me. I was hoping it would get to the right temperature at the desired fan speed, then stop heating but keep blowing at the set speed, but it doesn't. I overcame the logic of the "intelligent" system and focused on cleaning. The air quality (after turning it on and running it for a few hours) in my son's 10 x 12 foot bedroom was rated as fair. I figured it would improve to Good as the night progressed, which I automatically aimed for. It never did him any good. The machine has a cleaning status indicator "A” which turns green when reached. It never turned green. This agreed with the results I had read on the app. I ran the car for a few nights and no improvement in air quality. I did a few experiments by moving the air purifier around the room and turning the humidifier on and off. For the humidifier, I've seen spikes of "Poor" and "Very Poor" (as expected). Sensors picked up changes in air quality, but the air purifier did nothing to improve them. Left the car under constant surveillance over the weekend. It maintained a baseline of "Fair" and when I got home and started the car I couldn't improve on it. Dyson challenged me and said that this app and its products work. It's not like this. They aren't always obvious. Also, if it worked, the "A" would turn green at least once in a 120 square meter room. ft. Dyson said it was in one room, but I've moved it (even to other rooms). They said it was a humidor but the humidifier wasn't originally used and when it was finally used the air purifier was on the other side of the room. They finally said I could give it back to them but would need a replacement if it didn't meet my expectations so I'm going back to Revain.
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