Electric Heater. The shell of the whole machine is made of flame retardant and fire-resistant materials, and high-quality heating wire is used. Low noise the noise reduction design is adopted, and the noise is low when the heater is running and heating. Design Convection air duct design, strong convection, whole house circulation heating, warm heart, not hot hands, long service life and no open flame heating element. Overheating and power-off protection When the temperature is too high, the system will automatically cut off the circuit to prevent accidents.