Method for making hot water available in a building as service water in a hot water tank uses a fuel/solar heater device triggered by a control switch to heat up service water

摘要

The method involves detecting data on weather expected within a preset future period. Sensors (28,38) detect water temperature in a hot water tank (10). A fuel (40) or solar (30) heater device is triggered in order to heat up service water by relying on service water temperature and expected weather data. An Independent claim is also included for a device for making hot water available in a building as service water.