Bryan HaskinLooks like just having the door open isn't sufficient. Both the office and bedroom have their doors open and the HVAC is set to circulation.
Harald Hannelius 
@bhhaskin to get to that level I'm running a propane stove inside without any chimney outside for over an hour.
It was nice to read you're moving.
Maria Langer | 📝💎🌵🛥️@bhhaskin What should that number be? Recommended maximum?
@mlanger it should be under 1000. While it's technically not dangerous, it's also not great. There are no standards for indoor air quality for residential, but the OSHA maximum for longer term is 5000ppm and the short term maximum is 35,000ppm (15 minutes). You can start to have headaches, sleepiness, and poor concentration over 2000ppm.
@bhhaskin I'm very curious to see what mine is. I'll probably have to get a monitor when I get home.
@mlanger I recommend this one: https://aranet.com/en/home/products/aranet4-home
Although they are pretty spendy. They have an app for data tracking, but also can integrate with Home Assistant.