Indoor Air Quality Testing: What the Numbers Actually Mean

Buy a consumer air quality monitor and within an hour you're staring at PM2.5, TVOC, CO2, and formaldehyde readings with no clear sense of which numbers should worry you. Professional testing adds even more acronyms. We translate the alphabet soup into plain language: what each pollutant actually does to your body, which thresholds are normal versus concerning, why a single high reading isn't always a crisis, and when it's worth bringing in a remediation contractor versus opening a window. If you've ever wondered whether your office really is making you tired, this is the breakdown to read first.