FFS All he's asking is if someone has a heat exchanger. That old boiler, rebuilt will go on forever. 30% my arris. I paid £1200 per year for my gas/electric. Loft insulation saves 10%. Cavity wall saves 10%. Double glazing saves 5%. My new condensing boiler saves 20%. Why isn't my bill around £750? ......Discuss
Although this one didn't go on forever obviously and seeing as the rebuild would be from used parts for an equally ancient boiler I'd imagine they'd have similar wear.
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