What is TVOC?
In one line: TVOC stands for total volatile organic compounds — a single combined number for all the VOC gases in your air at once. Air-quality monitors report it to give you a quick sense of "how gassy" the air is; ventilation and activated carbon bring it down.
What it measures
Rather than naming each individual gas, a TVOC reading lumps them together into one figure (usually in µg/m³ or ppb). It rises when you cook, clean with solvents, paint, unbox new furniture (off-gassing), use aerosols, or when there's formaldehyde about. It's a useful trend indicator on an air-quality monitor — watch it spike when you spray polish, then fall when you open a window.
What the readings mean
There's no single universal limit, but broadly: low readings are good, a sustained high reading suggests a source worth finding (new furnishings, poor ventilation, a solvent). Because consumer sensors estimate TVOC rather than measure each compound precisely, treat the number as a relative guide — what matters is whether it's trending up or down and what makes it move.
How to lower TVOC
- Ventilate — the fastest way to drop a TVOC spike.
- Activated carbon — a genuine carbon stage adsorbs VOCs (a HEPA particle filter does nothing for them).
- Cut sources — low-VOC paints, airing new items, lids on solvents.
Next step
Want to bring TVOC down? See carbon-equipped units in the CleanAirKits store, and how carbon works in VOCs & activated carbon.
FAQ
What's a good TVOC level? Lower is better; there's no single legal limit for homes. Use it as a relative trend — find the source when it stays high.
Does an air purifier reduce TVOC? Only one with activated carbon — TVOCs are gases, so a particle filter alone won't change the reading. Ventilation helps most.