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Paragraph 7

Changes not yet applied. Later legislation changes this provision in ways not yet written into the text below:

A back boiler or boiler designed to be installed in the living space where—

(a)

the efficiency of such a boiler at effective rated output and at 30 per cent part load is equal to or greater than the efficiency requirements for standard boilers minus 4 per cent;

(b)

in the case of a boiler designed to be installed in the living space, it bears on its casing the explicit indication that it must be installed in a living space.