In a home residence of 290m² a solar thermal system was installed for under floor heating and domestic hot water. Large-area collectors TiSUN FA was used in the shape and color of the roof combined with TiSUN ProHeat 1000L hot water buffer tank. The house is inhabited by 5 people and enjoys 100% hot water round the year. The proper design of the building with a combination of good thermal insulation with the usage of the solar system has the effect of gas saving up to 50%.