IMPORTANT: It is essential to upgrade an existing flue system when replacing an old boiler; flue temperatures on a modern boiler are considerably lower and will not heat the chimney, as a result, condensation will form and may penetrate brickwork or drain back into the boiler causing internal corrosion (on a non-condensing boiler). Existing flexible corrugated liners must also be replaced; they will not be twin-walled as detailed in the diagram below, condensation will penetrate the liner.

Download Conventional Flue Check List

Use the 'Add to Quote' buttons to select each flue part. You can change the quantity of each product when you go to the quote page.

conventional open flue chimney system for oil boilers by Hounsfield Boilers