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Functional principle of the heating system
Makes sure that only heating water is in the hot wa-
ter pipes, and no air.
Prevents pressure in the system becoming exces-
sive.
Keeps the pressure in the system constant and acts
as a reservoir for the expansion water.
Vent
Safety valve
Membrane expansion
vessel
Depending on the working principle of the heating system selected, there may be extra components or
some may not be provided. Have your system explained in detail by the specialist.
Radiator(s) or underfloor
heating where fitted
Heating boiler
Mixer valve
Water heater
Chimney, flue system
Heating pump
The hot water heated by the heating boiler is conveyed to the radiators, or is used to heat the domestic
hot water in the water heater.
