Using chimney for condensing boiler Screwfix Community

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Venting high-efficiency boilers into masonry chimneys - …

1/5/1999 · If the deterioration continues, the chimney can collapse into itself and then possibly block the passageway for flue gases. I recommend that you have a heating professional give you an estimate either to line the flue with a code-approved, acid-resistant flue pipe or to consider the installation of a new flue pipe compatible with your boiler.

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