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The Smartfit Y Plan and the Smartfit S Plan are designed to provide timed independent control for both heating and domestic hot water circuits in fully pumped central heating systems. Time and temperature settings for both heating and hot water are set at the Room Unit, thus giving a single point of control.
The Sundial S Plan and the Sundial Y Plan are designed to provide independent temperature control of both heating and hot water circuits in fully pumped central heating installations. Time control must be provided by a programmer.
