The answer to 'types of water heater' is that there are several common types of water heaters used in homes, including storage tank, tankless, hybrid, and solar water heaters. Each type has its own advantages and disadvantages in terms of energy efficiency, installation requirements, and upfront costs.
Storage tank water heaters are the most common type, using a large insulated tank to store and heat water. Tankless water heaters, also called on-demand water heaters, heat water directly without a storage tank. Hybrid water heaters combine a storage tank with a heat pump to provide energy-efficient water heating. Solar water heaters use the sun's energy to heat water, reducing the need for electricity or gas.