Exactly this. Is my Awair Element perfectly accurate? No, but VOC at 200 or less when the windows have been open (on a good air day) looks very different than 3,000 when we finish cooking something on the stove.

Maybe my numbers should be 100 and 10,000, but it doesn't matter, I know when I need to turn the air exchanger on turbo and when we are back to "normal".