The term 'Heat Maker' can be summarized as a BOILER, which is a 6 letter word. A BOILER is a device that heats water or other fluids to generate steam or hot water for various purposes such as heating, sanitation, and even power generation. Boilers are typically fueled by natural gas, electricity, oil, or coal. Boilers are used in many industries, including residential, commercial, and industrial settings. Boilers are also used in the production of food and beverages, as well as in the medical field.