The heater will not be poisoned if it is placed in the room. The heater only has a heating function. Although it will not be poisoned, it will dry the indoor air. If you feel uncomfortable with your nose or throat in the morning, it means it is too dry. Consider buying a humidifier with a heater. Heater is a common household appliance, which is basically plugged in directly. It can generate heat in a short time, and the effect of keeping warm is very good, but you must keep a safe distance.