i think its just shameless advertising. anyway trace heaters are unessesary if the condense is fitted properly. I guess why BG need so many

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Agreed, they aren't fitted correctly that's why we have problems. Go figure!
when its minus 17 for a week straight in aberdeen or something, and rainwater and soil stacks themselves are freezing, and internal pipework in lofts and behind kitchens are freezing, even the bashers cannot blame bg.
with the weather we have been having the last 2 winters, 'fitted correctly' is no longer all thats required.