Gas heaters are appliances that use natural gas or propane to generate heat for residential or commercial spaces. They work by burning gas to produce warmth, which is then circulated through the area via ducts or radiators. Gas heaters are popular for their efficiency and ability to provide consistent heat during colder months. These heaters come in various types, including furnaces, space heaters, and water heaters. They are often preferred for their lower operating costs compared to electric heaters. Proper installation and maintenance are essential to ensure safety and optimal performance, as gas appliances can pose risks if not handled correctly.