The answer to the difference between water heater installation is that there are two main options: tank-style and tankless water heater installation. Tank-style water heaters store a large volume of hot water in a tank, while tankless models heat water on demand as it is needed.
The main benefits of tankless water heaters are that they take up less space, can provide an endless supply of hot water, and are generally more energy-efficient than tank-style models. However, tankless heaters also tend to have a higher upfront cost and may require upgrading your home's electrical or gas system to accommodate the new unit. Tank-style water heaters are generally less expensive to install but have higher ongoing energy costs and a limited hot water supply.