TVOC means Total Volatile Organic compounds. Volatile organic compounds are organic chemicals that become a gas at room temperature. There are many kinds of VOCs and they can be at the same time present. Some VOCs are bad for the health, they will cause eye, nose irritation, shortness of breath, headaches, and so on. Higher concentrations may cause physical irritation even damage. Most people are not affected by short-term exposure to the low levels of VOCs found in homes. But for the health, it suggests avoiding the exposure at high levels.
VOC’s come from many sources, even you can be a polluter! The Cleansers, disinfectants, Pesticides, air fresheners, construction materials, new furniture and so on are the VOC sources. They may increase the indoor concentration of VOCs due to off-gassing that may cause serious threats to your well-being. To stayed the room at low levels, try to open the window frequently for changing the Air.