A friend has had a quote to replace a heating only boiler for a Worcester Bosch 15Ri. The boiler appears well enough designed with a circular heat exchanger and top mounted circular burner. It seems simple enough. The heat exchanger is aluminium. With heat exchangers with top mounted burners I do believe the the heat exchanger does not need cleaning out as the condensate washes out any accumulated dirt into the condensate trap/pipe. I looked at the manual and they recommend a clean out with a brush. Is this something to do with it being aluminium?
Also, any feedback on its reliability? I have read some bad reports on W-B boilers.
Also, any feedback on its reliability? I have read some bad reports on W-B boilers.
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