had BG round to sell central heating
he's convinced me to keep the existing pipework and radiators (just add one for good measure)
and install a Bosch-Worcester combi condensate boiler
cost about 4 grand
thing is, I don't think I need a heater for the external condensate pipe
nor a very expensive magnet to filter iron out of the water
and I'm not entirely convinced I need an anti-corrosion/powerflush
(these last three items amount to £760.00)
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