Hot water supply refers to the system that provides heated water for various uses, such as bathing, cooking, and cleaning. This system can be powered by different energy sources, including electricity, natural gas, or solar energy. Hot water is typically stored in a tank or generated on demand through a tankless water heater. In residential settings, hot water supply systems are essential for comfort and hygiene. They can be centralized, where one heater serves the entire home, or decentralized, with individual heaters for specific areas. Regular maintenance is important to ensure efficiency and longevity of the water heater.