We have a new house--about a year old now--here in Texas with all the efficiency and insulation stuff. I noticed after working in my office with the door and w

We have a new house--about a year old now--here in Texas with all the efficiency and insulation stuff. I noticed after working in my office with the door and windows closed I didn't feel so good after awhile. I got one of those trendy Awair monitors and stuck it on my desk and hooked up the iPhone app. And sure enough, when I started not feeling well it was because the CO2 was over 1500 ppm. I don't know about the accuracy of the actual CO2 measurement, but I figure the delta is at least good enough to spot trends. And yeah, those times I don't feel well is always associated with a rise of CO2. I "fix" it by either opening the door and/or window or running the fan of the central air system. Our system also has a "bleed air" adjustment for outside air. I turned that up a bit, too. The Awair also does "chemicals" and PM2.5. I'm surprised our new house doesn't an issues with those, but I do see PM2.5 go up when the window in my office is open and "chemicals" fluctuates throughout the day but at a low level. I'm not exactly sure what "chemicals" means in this context; I haven't really looked into it yet. You might consider the Awair; I've been happy with it. I have several thousand systems that need tending at work and, same as you, I don't need to come home and do more. My wife's Windows gaming rig needs enough of that as it is...