The crossword solution for the term TYPE OF HEATER is SPACE, which stands for SPACE Heater. A SPACE heater is a device used to heat a single room or area of a building. It is typically powered by electricity, natural gas, or propane and uses convection or radiant heat to warm the air. SPACE heaters are often used as an alternative to central heating systems, as they are more energy efficient and can be used to target specific areas.