Concentric flues and ducts for gas fireplaces CGF

Concentric air-flue system for gas fireplaces CGF

Specialised system for sealed gas fireplaces

Concentric flues for gas fireplaces CGF is a specialized system designed to supply combustion air and remove combustion products from insulated, room-air-independent gas fireplaces. The system can be installed inside a building or integrated into existing brick or concrete smoke exhaust ducts, making it suitable for both new projects and renovation solutions. Since CGF is specifically designed for gas fireplaces, this category allows you to more clearly choose a solution for a specific purpose, rather than looking for a more general air and smoke removal option.

Technical features and construction

The CGF system is designed for gaseous fuel and is marked EN 14989-2 T600-N1-W-V2-L50xxx-O100. It can be used up to 600 °C operating temperature, belongs to N1 natural draft class and is suitable for operation in humid conditions. The inner pipe is made of stainless steel EN 1.4404, and the outer pipe can be made of stainless or painted stainless steel. The system has a wall thickness of 0.5 mm, is not resistant to soot ignition, and the specified distance to combustible materials is ≥ 100 mm when an insulated floor is used.

Components for different installation situations

The great advantage of CGF concentric chimneys-ducts is the clear and practical choice of components. The system includes concentric segments L-1 m, L-0.5 m and L-0.25 m, concentric tee 90°, concentric flue with cover, concentric elbows 90°, 45° and 30°, as well as concentric elbow with flue 90°. This range allows for more accurate route planning, more convenient formation of direction changes, and provision of service access where more flexible connection to a fireplace or smoke exhaust duct is required.

Connection and termination solutions

The CGF system also includes additional elements required to form a complete and tidy solution. The range includes concentric horizontal nozzle, concentric nozzle with air intake, concentric connection sleeve, concentric condensate collector and concentric intermediate support. The dimensions of the connection coupling D1 and D2 can be adjusted according to the dimensions of the connection pipes of a specific fireplace model, so the system can be more precisely adapted to a specific device. This is especially important in the gas fireplace segment, where not only technical compatibility is important, but also a clean, aesthetic end result.

Why choose CGF

If you are looking for a solution that combines air supply, combustion product removal, stainless steel quality and component compatibility, CGF concentric flues for gas fireplaces are a very strong choice. This system is designed specifically for the gas fireplace segment, so it helps to plan a technically consistent and visually neat connection more easily. When choosing a specific solution, it is important to evaluate the fireplace model, connection geometry and necessary additional system elements.