While a tankless water heater can provide hot water for various household needs, it is not designed to be the sole energy source for running an entire house. Tankless water heaters are primarily meant to supply hot water on-demand, rather than generating heat for the entire home.
A tankless water heater can efficiently provide hot water for showers, faucets, and appliances like dishwashers and washing machines. However, it does not typically have the capacity to meet the heating demands of an entire house, such as powering radiators or baseboard heaters.
To effectively heat a home, a comprehensive heating system is required, which may include a separate boiler or furnace that utilizes a different energy source, such as natural gas, oil, or electricity. These systems are designed to generate heat for the entire house and distribute it through the various rooms.
A tankless water heater is an excellent choice for supplying hot water, it should not be relied upon as the sole source of heating for an entire house.