The 82/71 rule

By Bob Walsh Bob Walsh Bob Walsh is Hamworthy technical director. He has over 21 years' experience in the gas industry, with a vast knowledge and great appreciation of the sector. 2003-02-02T09:23:00

As office building insulation requirements improve and the capacity of heating (whether wet or air systems) is reduced, why are 82/71°C water temperatures still used instead of more economic temperatures such as 60/50°C? Flow rates would remain unaltered and boilers would operate in condensing mode, with the only ...

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