05/16/2026
I had a very interesting experience in Total Volatile Organic Compound measurement in a home this week. I do this in just about every inspection I do.
In this particular home the longer I was in the home, the higher the TVOC levels reached. And they reached levels I'd never seen before. I took my meter outside to check if it was a meter issues, and it was completely normal outside.
As we went through the house from top to bottom the levels kept reaching new highs. At the point where the meter showed over 11000 ppb I saw the HVAC guy finishing up the installation of the water heater. I was relieved. I may have felt a little like when Pedro Paez, James Bruce, or John Hanning Speke discovered the sources of the Nile!
But this isn't about my adventures in TVOC measurement.
This is about how mundane things that every homeowner will experience can have dramatic impacts on the indoor air quality in the home. Every homeowner will eventually have their water heater replaced. Probably will paint or hire someone to paint. May stain or polish hardwood floors or furniture. And all of those activities will bring a LOT of chemicals into your home. The tighter your home is, the longer those chemicals will stay.
If you want to avoid this, and you should, because even if no one in your home has reacted yet, there is a certain point where someone may....and in the meantime huffing chemicals isn't a desirable activity for healthy minded people.
Demand the work areas are contained. Demand negative air ventilation is the areas where deep cleaning, or chemical containing materials will be used. Don't wait for symptoms! Also demand to see the Safety Data sheets for any materials brought into your home. Do that before you sign a contract, and have that in your contract.