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You can often get a rough idea of how clean or dirty the

You can often get a rough idea of how clean or dirty the system is yourself by carefully bleeding a little water from a radiator valve, with a tissue when refilling the heating system, ensure the installer adds a chemical inhibitor to safeguard against the formation of sludge, corrosion and scale build–up. This radio frequency (rf) digital timer provides heating and hot water control via a simple user interface. Customized boiler/burner maintenance.

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