Why should I choose heat pump with built-in hydro unit?

First of all because all the operating, safety and control parts of the unit are built-in from the manufacturer in one system, where the only thing that the installer has to do is to connect the water piping (hot or cold) to the local units (fan coils etc), the electric power supply and the drainage piping. It has been proved that the heat pumps offer low cost and environmental friendly heating, contrary to any other mean of heating (especially with plate heat exchanges). It is achieved space saving (due to the relatively small sizes of the units) and also an easy distribution of the hot or cold water to the local units, as the water piping dimensions are much smaller comparably to an air-duct system.