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Sorry its a Glowworm Ultimat 40FF, Its not a combi boiler I think its a condensing boiler? Cheers :oops:

Hi, I have a sealed system running from mains pressure with a large Sadia high pressure water tank to store hot water. My house is a town house on 4 storeys and the downstairs rads are cold. The boiler is on the second floor and the tank and pump on the third. The rad in the top bedroom...