Introduction

Warm-water underfloor heating (UFH) has become more widely used in the last 10–15 years. It provides background heat in large spaces and makes tiled floors much more comfortable to walk on in houses. Compared with traditional radiators, UFH provides a number of operational benefits because of the lower temperature of the circulating water. This can improve the efficiency of the boiler supplying the heat and allows the use of renewable energy sources such as ground source heat pumps.