Hydronic centralized units HCU with no limit of capacity belong to Hydronic centralized systems (HCS). Systems above 60.000 btu/h are three-phase supplied. Centralized hydronics units sea water condensed circulate fresh water in a fan coils net for the distribution of heat and cold into the cabins.

Two models are available:
1) HCU single with off board only the electric box
2) PHCU preassembled of slightly bigger dimensions but including in a monobloc all fan coils net accessories such as the circulation pump for boat, the expansion tank, the filling sailboat kit with manometer, the electric box, allowing so a cut of installation costs for boat supplier yards.