I got one too, and a PM2.5 laser sensor. It's a huge challenge during wildfire season to keep the PM2.5 and CO2 both good. Needs filtered HVAC to actually do it

I got one too, and a PM2.5 laser sensor. It's a huge challenge during wildfire season to keep the PM2.5 and CO2 both good. Needs filtered HVAC to actually do it. I prefer high CO₂ over high PM2.5 of course.