Isokern Flue ranges are manufactured from pumice which has natural insulating properties. This is the unique property that separates pumice from all other chimney materials.

Pumice allows the flue gases in the chimney to quickly reach their optimum temperature enabling the heating appliance to reach its optimum performance shortly after lighting.

It also keeps the chimney warmer longer as the heat output of the appliance decreases – once again aiding performance and reducing the likelihood of condensation and soot build-up.

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Isokern DM Modules

DM (Double Module)

The double wall system maintains flue gas temperatures while preventing heat transference to the outer casing. The separation of the inner and outer components also allows for thermal movement, reducing the risk of cracking, leaking or staining.

The Double Module is available in 3 outer casing sizes – DM36, DM44 & DM54 and are ideally suited to new builds and the construction of entirely new flues and chimney stacks.

Isokern Flue Liner

Flue Liners

The Isokern flue liner range consists of over 17 different sizes. They can be used for new build, extensions and relining existing chimneys. The system is suitable for use in traditional masonry constructed chimney stacks.


Isokern Firechest


The Isokern range of firechests, supplied as flat packs, can be easily and quickly constructed to produce a neat and pre-formed fire opening ready for finishing, and are compliant with the new Building Regulations.

The Isokern firechests come in a wide variety of sizes and can be used for wood-burning or gas-burning, indoor or outdoor fireplaces.

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