Schiedel ABSOLUT XPERT
Delivers absolute airtightness
ABSOLUT XPERT delivers absolute airtightness with a leakage rate of V50 ≤ I m³/m(h). Moreover Absolut guarantees the air tightness requirements of the system without any additional insulation and without rendering of the outside surface of the chimney block.
ABSOLUT XPERT guarantees a surface temperature of at least 17°C both on the outside of the chimney block and within the air supply, thereby meeting the requirements of the highest energy efficiency class.
ABSOLUT XPERT guarantees a secure, room sealed operation, and is suitable for all types of fuel, particularly renewable fuels.
For telephone enquiries about this product, please call our Northern Ireland and ROI office on +44 28 87 740436.


- Structurally sound components for energy optimisation within buildings
- Saves resources and reduces costs at the highest levels of home comfort
- Contributes towards achieving EU 20/20/20 climate targets
- Improves the ecological footprint of a building
- GW3/efficiency criterion condensate resistant even after soot fire
- Suitable for all fuels
- Use with current and future renewable fuels
- Safe connection to a room sealed appliance
- Air supply shaft can be serviced at any time (technical inspections possible)
- Makes heating possible in airtight buildings by the provision of combustion air via the integrated combustion air shaft
- Better added value
- Cheaper to install in terms of both time and money
- No need for any additional insulation throughout the length of the chimney
- Blower door tightness achieved without any additional rendering of the thermal blocks

AIR TIGHT FOIL SEALING KITS INTERNAL AND EXTERNAL
Sealing where the Chimney penetrates through an airtight building shell (roof construction), designed for passive houses

THERMAL SEPARATION BLOCK
Ensures thermal separation between the interior and the exterior of the building

CHIMNEY BLOCK WITH INTEGRAL INSULATION
Both chimney block and ventilation shaft are fully insulated to avoid heat bridges

FLUE PIPE CONNECTION
33 cm standard fitting with blower door front plate and ring with flue liner support

AIR INTAKE ADAPTER
for provision of combustion air (for aligned stove connections) or front fitting

PREFABRICATED BASE
3 possible positions for the combustion air shaft using the U-block sections

PREFABRICATED BASE
Pre-mounted base for simpler, faster and more secure fitting onto the thermal baseplate
Chimney components required to meet the requirements of the Passivhaus certified system:

XPERT chimney block with foam concrete insulation

Thermal separation block

Isostatic liner

Air tight sealing kits (inner and outer)

Inspection kit for loft access (where used)

Connection pack for 90˚flue connection

Base pack

Thin bed mortar
Main Component Weights (Kg)
MAIN COMPONENT WEIGHTS Kg) | |||
Diameter (cm) | 14 | 16 | 18 |
Isostatic Liner | 8.30 | 10.70 | 12.00 |
Chimney Block | 38.70 | 38.70 | 38.70 |
Thermal Block | 30.91 | 30.91 | 30.91 |
Prefabricated Base | 150.00 | 150.00 | 150.00 |