The answer to 'difference between water heater' is that there are two main types of water heaters - tank-style and tankless (also called on-demand). Tank-style water heaters store and heat a large volume of water in a tank, while tankless heaters heat water on-demand as it's needed. Each type has different features, benefits, and use cases that homeowners should consider based on their specific needs and home setup.
Tank-style water heaters are the traditional and most common type. They have a large storage tank that holds 30-80 gallons of heated water, which is kept at a set temperature (typically 120-140°F) and ready for use. The main benefits are that they provide a steady supply of hot water and are generally less expensive upfront. However, they consume more energy to continuously reheat the stored water and have a limited capacity, so they may run out of hot water during high-demand periods.