There are several types of space heaters, but they all work by converting energy into heat and then transferring that heat to the air in a room.
The most common type of space heater, which is found in many homes and small offices, is an electric radiant heater.
These heaters have a heating element that emits infrared radiation to warm the room. When this radiation hits objects in the room, it causes them to warm up. Another type of electric space heater is a convection heater, which is one of the more common types of heaters as it is usually a bit lower in price. These heaters have heating elements that warm up the air around them. The warm air then rises and circulates around the room, causing objects and people in the room to feel warm. Some space heaters also have fans that help to circulate the air, which can require a bit more maintenance as the fans typically get covered in dust over time and need to be cleaned. Oil-filled radiant heaters are another type of space heater which are also quite common in homes. These heaters have a coil filled with oil that is heated by an electric element. The oil then transfers heat to the metal coils around it, which in turn transfer heat to the air. Geothermal heat pumps are a type of furnace that uses the ground as a source of heating and cooling for a home. These systems are very efficient and can save homeowners money on their energy bills. Take your best pick and good luck!