You can use something such as awair (https://www.getawair.com/) to track your indoor air quality (voc's, etc.).
In the first few weeks of owning one we realized if we leave our bedroom door open the CO2 is much lower while we sleep. Our quality of sleep has improved.
In the first few weeks of owning one we realized if we leave our bedroom door open the CO2 is much lower while we sleep. Our quality of sleep has improved.