Excessive levels of TVOCs can cause chronic damage to the body’s immune, nervous and digestive systems. TVOC is the abbreviation of “Total-Volatile-Organic-Compounds”, meaning Total Volatile Organic Compounds, refers to the saturated vapor pressure of more than 133.32 Pa of organic matter at room temperature, belonging to a more serious indoor air pollution. Generally speaking, low concentrations of TVOC will not cause serious acute damage, but will cause long-term chronic damage. TVOC is not a pollutant gas, but a variety of polluting gases in general, the human body long-term exposure to TVOC, will cause the body’s immune system function is low, affecting the nervous system, resulting in chest tightness, dizziness and headache, drowsiness and weakness, etc., but also may appear loss of appetite, nausea and vomiting, as well as discomfort in the throat.