Govee Smart Wireless Indoor Air Quality & Humidity Monitor

"The WHO guidelines state that annual average concentrations of PM2.5 should not exceed 5 µg/m3, while 24-hour average exposures should not exceed 15 µg/m3 more than 3 - 4 days per year."
https://www.c40knowledgehub.org/s...our%20mean.

The general issue is that we know areas with higher pm2.5 tend to have higher diagnosis incidence rates of associated diseases, like asthma or cardiovascular disease, and slightly lower life expectancy in those communities. So at a population level we know it's worth it to take measures to improve air quality in our communities since many people get exposed. Individually, your risk is generally low unless you have a condition like asthma or cardiovascular disease.

Ideally, you want pm2.5 ug/m^3 to be single digits in normal life. This thing has a large error range of +/- 15 ug below 100 ug so it's a really coarse measurement that doesn't tell you much until you get a measurement above say 25 ug. At that point you'd want to see that number go down.

The main use of this would be to get a sense of what sort of indoor air quality you have and if the pm2.5 stays elevated often then consider measures to reduce possible sources (vacuum more, using a cooking range hood) and evaluate introducing clean air or adding air filtration. We haven't really developed guidelines for what is reasonable to do as individuals for our homes regarding pm2.5, but if you routinely see very high numbers then action may be warranted.

I haven't looked into this for a few years so something may have changed, but these cheap pm2.5 sensors can be impacted by humidity so you'd want to keep in mind that things introducing water vapor particles, like boiling a pot of water, can falsely spike the value sharply.

Serious question here. If we put this in our house and check different rooms, what is it really looking for and finding for the air quality? (Temp and humidity are obvious)

If it says the pm is moderate or high, what does that mean, what could it be, and what would it we be able to do about it?

No smokers, nothing abnormal in the house.

Just curious about what this finds and what someone would do if it is high.

I don't understand it. Mine has been .001 - .003 for most the last 7 months. (my average since September is .002)

It has jumped up to .009 - .012 at times, and I never did figure out why. The other day at about 9:45pm (we were probably watching TV) it jumped up to .030, and it slowly went down over the next 10 hours. No idea what that could have been. It's in an upstairs bedroom and I don't understand at all what I can actually do about these numbers. If it doubles, suddenly about the previous high over 6 months what do you do, open a window, or go outside? It seems silly unless I can actually take action.

What have others found for causes of an immediate jump into such high numbers?

Frankly this doesn't really report much of anything… temp, humidity, time, and PM2.5? who cares.. you're better off just looking at your phone. Where' s CO2, smaller PM, Radon, maybe formaldehyde? I wouldn't waste my coin on this.

I don't understand it. Mine has been .001 - .003 for most the last 7 months. (my average since September is .002)..It has jumped up to .009 - .012 at times, and I never did figure out why. The other day at about 9:45pm (we were probably watching TV) it jumped up to .030, and it slowly went down over the next 10 hours. No idea what that could have been. It's in an upstairs bedroom and I don't understand at all what I can actually do about these numbers. If it doubles, suddenly about the previous high over 6 months what do you do, open a window, or go outside? It seems silly unless I can actually take action.What have others found for causes of an immediate jump into such high numbers?

Seriously? Why would they disable 2ghz?

Drat. Would've bought a few if it worked with HA

It's not outdoor air quality seeping in? Isn't offgassing from household stuff a major cause of poor indoor air quality? And that increases with higher humidity & temperatures... I read that once you get particles of the size into your home, it takes at least a month of airing out your house to clear it They may have been talking specifically about particles from wildfires.
( How much would a purple air monitor cost? is it much more accurate?)

It'd have to be a Govee fan/air purifier unfortunately if you want to do something like that.