MF - Double-walled, pre-insulated & modular
Universal performance across all operating conditions
The Schiedel MF is a modular, three-wall stainless steel exhaust and supply-air system designed for residential, commercial, and industrial installations.
Equipped with internal high-grade lip seals, the system handles condensing boilers, low-temperature units, solid fuel appliances, CHP plants, and industrial bakeries or ovens. Its pre-insulated design prevents cold and thermal bridges while allowing stress-free thermal expansion of the inner flue liner during heating cycles.
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High overpressure capability
Certified for extreme pressure conditions up to 5000 Pa. Guarantees total gas tightness for modern condensing technology, combined heat and power systems, and forced-draft appliances.
Certified for extreme pressure conditions up to 5000 Pa. Guarantees total gas tightness for modern condensing technology, combined heat and power systems, and forced-draft appliances.
Factory-installed precision seal
Features acid- and heat-resistant elastomer lip seals integrated at the factory for rapid, leak-tight push-fit assembly. Fully suitable for wet (W) and dry (D) operating conditions.
Features acid- and heat-resistant elastomer lip seals integrated at the factory for rapid, leak-tight push-fit assembly. Fully suitable for wet (W) and dry (D) operating conditions.
Thermal separation & soot-fire resistance
High-density mineral insulation (25 mm to 50 mm depending on diameter) prevents thermal bridging across building penetrations. Tested and certified soot-fire resistant for solid fuel applications.
High-density mineral insulation (25 mm to 50 mm depending on diameter) prevents thermal bridging across building penetrations. Tested and certified soot-fire resistant for solid fuel applications.
Modular compatibility & low weight
Engineered with lightweight stainless steel shells for low structural load. Fully compatible with Schiedel ME and UE system components, silencers, and specialized wall penetrations.
Engineered with lightweight stainless steel shells for low structural load. Fully compatible with Schiedel ME and UE system components, silencers, and specialized wall penetrations.
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Further interesting content
ME - The single-walled exhaust system
A modular exhaust system made of stainless steel. It is suitable for refurbishments, ventilation, condensing boilers, etc.
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US - High temperatures & neg. pressure
The stainless steel US air/flue gas system is ideal for high flue gas temperatures in negative pressure operation for room-sealed gas fires.
Details & Services
Find out more about the details and services for the MF gas flue system, such as the design, detailed technical data or suitable services.
The system structure
The MF system is mounted on the wall or on the floor. This includes the inspection door/cleaning door and all other components. After the wall duct to the respective heating system, the flue gas system is crowned by an outlet cone.
Technical data
| Basic data (dimensions, weight & co.) | |
Wall thickness per diameter (internal) |
0,4 - 0,6 mm |
Insulation thickness per diameter |
25 - 50 mm |
Wall thickness per diameter (outside) |
0,4 - 0,5 mm |
| Application | |
Flue gas temperature (dry) |
≤ 600 °C |
Operating temperature under negative pressure |
≤ 600 °C |
Operating temperature under positive pressure |
≤ 200 °C |
Short firing temperature under positive pressure |
≤ 200 °C |
Short firing temperature under negative pressure |
≤ 600 °C |
Operating pressure |
≤ 5000 Pa |
Material (Inner liner) |
AISI 316L-EN 1.4404 |
Material (Insulation) |
Mineral fibre |
Material (Outer case) |
AISI 304-EN 1.4301 |
Thermal resistance by insulation thickness |
0,37 - 0,56 m²K/W |
| General product features | |
Operating |
Negative pressure (N), Humid, Dry, Positive pressure (P-H) |
Room sealed |
No |
Occupation |
Single, Multi |
Suitable for passive house |
No |
Heating technology |
Low temperature technology, High pressure 5000 Pa, Condensing boiler technology, Conventional heating technology |
Suitable services
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