As a precaution against possible electric shocks, all wiring must comply with the National and Local Electrical Codes in the United States. Before energising the heater, make sure that the voltage coming from the power supply matches the ratings printed on the nameplate. Dayton electric heaters are hot when in use. To avoid burns, do not let bare skin touch hot surfaces. If you insert or allow a foreign object into a ventilation or exhaust opening, the heater might get damaged or you might receive an electric shock.Don't block air intakes or exhausts in any way. Keep combustible materials away from the heater, like crates, drapes, etc. Don't install heaters behind doors, furniture, towels or boxes. A heater has hot and arcing or sparking parts inside. You should not use it in areas where gasoline / paint / flammable liquids are used or stored, or in areas where volatile gases are present.