Hi @Django14,
Thanks for joining and great question!
Unfortunately, consumer-grade VOC monitoring is a complex topic (just have a look at this thread!): Air Quality Monitors for VOCs
Most devices use relative indexes, and those that don’t show ‘absolute’ values that usually aren’t very accurate due to cross-sensitivities. You could try a device with an adjustable baseline (like AirGradient), but any device would need to be regularly taken outside to establish a meaningful baseline.
You could get some insight from a consumer-grade device, but I would definitely still recommend proper tests in your case.