As shown in the figure 2 the Task A is based in three main pillars to cover an overview of the state of the art in the field of TDHP. In this task all involved countries will produce country reports focused on the description of their heating and cooling markets, dividing the systems into two groups, under 100kW and above. Normally big powers correspond to industrial applications designed to solve specific problems, while systems with smaller capacities are mostly used to provide energy to residential houses or office buildings. In these cases, the possibility to find comparative values that make possible the efficiency evaluation of the facilities and the installed machines is quantitatively more important, especially if we take into account that approximately 40% of the energy demands of an developed country are used in the domestic and office market.

The results will not only be used to give a global overview of the market, but will also help to understand the restrictions and to notice the possible opportunities and barriers of the technology as well as country specific differences, due to different political situations, building codes with different energy saving levels, incentives and funds to be spent on renewable energies. (i. e: fiscal treatments, laws about the uses of the geothermal sources, laws about legionella, etc.)