Heaters are devices designed to generate warmth in indoor spaces. They work by converting energy, usually from electricity, gas, or oil, into heat. Common types of heaters include electric heaters, gas furnaces, and radiant heaters. These devices are essential for maintaining comfortable temperatures during cold weather. Heaters can vary in size and efficiency, with some being portable and others installed as part of a home’s heating system. Many modern heaters come with thermostats and timers, allowing users to control the temperature and save energy. Proper maintenance is important to ensure safety and efficiency in heating systems.