An interesting alternative to fuel-operated parking heaters that is cost-effective to install are electric parking heaters such as the new eThermo Top Eco. It only requires a standard 230-volt socket and is connected to the power source, for example at the carport, by means of a charging cable. Just like the fuel-powered systems, the electric parking heater is installed in the vehicle's coolant circuit. It preheats both the interior and the vehicle engine and defrosts windows in a short time. A further advantage is that no emissions are produced during preheating.