The concept of car heating existed before the invention of the car. Portable heaters were used in horse carriages and later in the first carriages. However, soon after, systems were developed that took advantage of the heat released by car engines. This basic idea has been in use since the early 20th century, albeit with better technology.
Currently, car heaters are controlled only by a dashboard switch. The operator simply adjusts the dial or knob until temperature, airflow and direction are satisfactory. This way it is possible to transfer heat to the wrap-around to melt it. More and more cars are even offering separate heating and cooling options for riders and drivers. You can get details on micro sprnt engine heater via https://www.hotheadheater.com/hothead-jr-pro.
Other cars go a step further and offer automatic temperature control. The driver selects the desired temperature, desired airflow and desired direction. Once configured, the system will automatically detect the interior temperature and take the appropriate action to make the environment exactly what the driver intended.
It is always possible to reset the settings until they are exactly what the driver wants. The biggest advantage of this system is that the driver doesn't have to set every control every day. The system knows what it wants, records the climate in the car, and adjusts its own controls.
Portable car heaters have not been completely replaced. Some drivers find an additional heater that attaches to a lighter or car battery and is especially useful in cold weather. Smaller portable heaters will help melt the ice, and some larger heaters will add extra warmth to the backseat or the entire seat.