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  1. E

    Replace Potterton Prima 50 B ( inst 1996 ) with a condensor

    The above is installed in a 5-bed house to 1996 regs in Northumberland ( no cavity wall insulation. 15 rads, all single convectors ). The house scored 90 on the SAPS test but design heat load in a dormer room over garage is way undervalued. By installing a rad 3 times original output, design...
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