Most sunrooms can be heated using space heaters, which are available at home improvement stores such as Lowe's and The Home Depot. While a space heater that uses fuel might provide slightly better efficiency, electrical heaters allow users to avoid having to vent the exhaust.
Sunrooms typically have a significant amount of glass, which can radiate away heat. As a result, connecting a sunroom to a central heater might lead to wasted energy, especially if the room is unoccupied most of the time. While some gas and oil space heaters are designed to operate without venting, electric and infrared heaters provide relatively efficient heating without the carbon monoxide risk.