Schiedel Isokern
Schiedel Isokern chimney systems are made from natural volcanic pumice. They are quick to build, highly insulating and resist cracking, making them a first choice for open fires, stoves and inglenooks.
Choose a range below. Not sure what you need? Ask us – we can help with design and specification.

Double Module DM36
150mm flue for smaller inserts, stoves and solid fuel/oil cookers.

Firechests & Gathers
Magnum and standard firechests, gathers and firebricks.

Double Module DM44
180mm and 200mm flues for inserts, stoves and open fires.

Double Module DM54
300mm and 345mm flues for Magnum firechests and larger appliances.

DM Accessories
Reinforcement, glue and fixings for DM chimneys.

Liners & Accessories
Round liners, bends, support blocks, pots and more.
Why pumice?
Pumice is a natural insulator. This is the unique property that separates pumice from all other chimney materials. The insulating properties of Pumice allow 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.
- Resistant to temperature change: Pumice has very little expansion and contraction with temperature change. This reduces the possibility of cracking and structural damage that can occur with other products.
- High Insulation Properties: Pumice is a natural insulator, able to maintain the temperature of flue gases when other products have allowed the temperature to fall below the dew point.
- Lightweight: Pumice is strong yet lightweight allowing one person to lift and build the chimney units.