There is a return window of 30 days if you do decide that is your best option.
AQI will fluctuate over time. Those options you see in green up there are the pollutants measured by the EPA for your general location OUTSIDE of your home and they vary over time depending on the current conditions:
- Ozone (O3)
- Particulate matter (PM10 and PM2.5)
- Carbon monoxide (CO)
- Nitrogen dioxide (NO2)
- Sulfur dioxide (SO2)
- Lead (Pb)
Additionally, the pollen levels are tracked separately (that’s in the other tab that says Pollens).
These help you and the air purifier to know the general conditions of the area outside the home. They do not tell you what the conditions directly near your air purifier have been. Apparently, the air outside has been pretty good for you today and the air purifier doesn’t need to run much to keep your air at healthy levels right now. That will fluctuate. I recommend looking up the AQI history for your location to see how often it gets bad where you live. In my location in 2018 we had 40 days in moderate to poor, 36 days at unhealthy for sensitive groups, and 19 days at Unhealthy, very unhealthy or hazardous. That means there were 270 days of good air quality…so most days (almost 10 months worth) I probably didn’t need an air purifier, but there were about 2 months where it was needed, sometimes severely needed. Also there are different conditions inside my house to a degree.
The conditions near the air purifier are determined more based on the laser particle sensor in the back of the unit, so make sure it is not set up directly against a wall or something. Give it a little bit of space to have some air behind it to sense the level of dust, smoke, etc in the room. When the conditions get up in number, the air purifier will put a white dot on that graph, I can confirm I saw several dots on my purifier yesterday. I think I had 5 of them between 100-200 AQI. Today I have none because everything has been pretty clear today.
The AQI graph will change depending on the conditions. If you want to verify if it’s working as you expect, try moving it into the kitchen near the stove for a day (assuming you cook on the stove regularly), or move it into the bathroom for a while. It should pick up more particulates in the air there, especially if someone take’s a hot shower. By the end of the day you should get a feel for it.
Apparently the conditions near your Purifier have been really low today. I imagine things are generally a lot worse when the pollen gets going, and in the winter with smog and other times. It also depends on the room…like I said, things are usually worse in the kitchen, or near things that are odorous…like pet litter or baby diaper bins or whatever. Each individual will have different needs, but almost everyone has terrible air dozens of days per year. If you are in the middle of a good air period in a good location, you could have 80% of your days be good days like mine…and then judge the need based off of only the first few good days and not realize you have 2 months or more of bad days per year. Maybe more depending on the particular part of your house in question.
If your air purifier is in a location with great air, then it will run less and your filter will last longer (bonus), if it is in an area with terrible air way often, then the filter will run more and need replacing more often (but at least your lungs and health are significantly improved from having to be the air filter instead).
It’s up to each person…but I can confirm that I see white AQI dots on mine sometimes when it has had bad air throughout the day.
EDIT UPDATE:
I just realized I had mine set to “Off” all day today instead of “Automatic” lol…I was testing something for another user and I forgot to switch back to auto when I was done…as soon as I set it back to AUTO it immediately put a white dot back on my graph today:
After a few minutes my AQI changed from 32 to 55 so the dot moved up it’s placement based on the increased average during this time period (it didn’t put 2 dots, it just averages the AQI):
Try making sure your Air Purifier is set to Auto for a while and see if it changes at all.