TOSOT Air Purifier with H13 True HEPA Filter

I have this in my workshop, and I noticed a huge difference in air quality right away. It seems to handle a large amount of air just fine. I the automatic mode is where I leave it in the day time and it does fluctuate the speed as it reacts to how many machines I have running or what I’m working on. That automatic mode also seems to actually react correctly depending on what I’m doing instead of randomly changing speeds. This tells me that the onboard sensor is working well. The volume on the highest setting is less than I thought it would be. My scientific measurements (ears) tell me that it’s less than a window fan I have. Anyway, it’s not a bother to me on the highest setting. Lowering the speed through the steps obviously lowers the volume level down to the quietest mode which has a nighttime symbol which is accurate; I would have no trouble sleeping with this running next to me in that mode. I also like that the controls and operation are super simple. I don’t know how they could have even made it easier honestly. I did buy 2 of these, and one was had a problem in shipping. I contacted the company, and even though it wasn’t their fault they actually took care of everything and didn’t give me any kind of hassle or hoops to jump through. I am happy to have bought these from a what turns out to be a real good company, and will be buying from them in the future if I ever need to.