Yes, underfloor heating is more efficient than radiators. When underfloor heating is designed for a building, the heat loss calculations are done very accurately which allows the system to be designed to the buildings actual heat requirements. This combined with low water temperatures, even distribution of the heat, and a well controlled setback period, makes for a very efficient system to have in any home.

Like for like comparative tests have been carried out across Europe proving these facts. There are many variables that can affect the projects efficiency, some more than others. These can include poor insulation, very large areas of glass and excessive air exchange rates.