Ground-source energy is a renewable and sustainable source of energy which can be used for heating and cooling a building. Over the past few years, architects, consultants and building owners have realised that renewable energies are the future. At 1.5m deep, the ground temperature is around 8-12ºC and below 15m deep it is a constant 10ºC. Ground-source energy can be exploited the whole year around and provides significant reductions in carbon dioxide emissions and energy costs.