Space heaters can be moved from room to room as needed, are generally quiet, and heat slowly or quickly as the user requires. They also save money by not wasting the energy needed to heat rooms that aren't being used.
There are three basic types of space heaters: radiant, convection and conductive heaters. Radiant heaters use oil to heat. Because of this, they don't need an electrical source and can work during a power outage. Some of them use infrared or a quartz element to generate heat. However, radiant heaters that use gas or oil need to be vented to the outside.
Convection heaters use an internal element or elements to warm the air. These heaters take a while to heat up, but the heat they produce lasts for a long time. Therefore, they don't need to be run constantly. They are noiseless, and some have fans to make sure the warmed air circulates around a room. Conductive heaters are electric heaters that use an element such as mica or a chromium and nickel alloy to generate heat.
Space heaters are generally eco-friendly and economical. Most have temperature settings as well as timers that allow them to run for a set period of time.