What are coaxial chimneys?
A coaxial system enables the safe operation of a boiler by supplying combustion air directly from the outside, while flue gases are discharged through a separate channel. This means that the boiler does not use air from the room, contributing to greater safety and more efficient system operation.
Our coaxial chimneys are made of high-quality stainless steel materials and are designed for long-term use under various operating conditions.
Our chimneys come with a 15-year warranty, although they are designed to last much longer!
How does a coaxial system work?
Two pipes, one efficient system
A coaxial chimney consists of two pipes:
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Inner Pipe: Discharges combustion gases from the boiler to the outside.
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Outer Pipe: Supplies the fresh air required for combustion directly to the boiler.
The outer pipe also acts as a cooling system for the inner pipe, preventing the coaxial chimney system from becoming excessively hot and reducing the risk of fire.
Thanks to this chimney system, the productivity and efficiency of gas-fired equipment can be improved.
Why choose our coaxial system?
The supply of combustion air and discharge of flue gases take place through a single system, improving energy efficiency.
The sealed combustion system reduces the possibility of flue gases returning into the room.
Manufactured from high-quality stainless steel materials resistant to condensation and corrosion.
A wide range of components allows for quick adaptation to different buildings and installations.
The system is designed for easy cleaning and long-term reliability.
Materials and manufacturing quality
Reliable materials for a long service life
Our coaxial chimneys are manufactured from carefully selected materials:
| Component | Material |
| Inner pipe | AISI 304L |
| Outer pipe | AISI 430 |
| Connection | Modular component system |
| Application | Gas and condensing boilers |
Why Chimney Tech?
- Manufactured in Serbia
Complete production and quality control in one place. - Complete product range
A wide selection of pipes, elbows, reducers, and components.
- For different types of buildings
For different types of buildings From family homes to larger residential and commercial buildings. - Expert support
We help you choose the right system for your project.
Horizontal or vertical coaxial chimney?
Horizontal systems
Horizontal coaxial systems are most commonly used with boilers equipped with a fan-assisted flue gas exhaust system. They are a practical solution when there is no need to route the chimney through the roof of the building.
Ideal for:
- Apartments
- Family homes
- Small commercial buildings
Vertical systems
Vertical coaxial chimneys are used when the building configuration requires flue gases to be discharged through the roof. An advantage of this system is the heat exchange between the outgoing flue gases and the incoming air, which can contribute to more efficient heating system operation.
Suitable for:
- Family homes
- Residential buildings
- Commercial buildings
There are two main types of vertical systems, depending on the characteristics of the building:
Individual and collective systems
Individual coaxial chimneys
Designed for buildings with a single heating appliance.
Most commonly used for:
- Family homes
- Holiday homes
- Small commercial spaces
Collective coaxial chimneys
Used in multi-family residential buildings where multiple heating appliances are connected to a shared system.
Suitable for:
- Residential buildings
- Apartment complexes
- Larger commercial buildings
Frequently Asked Questions
Need a coaxial chimney for a gas condensing boiler?
Contact us and we will help you choose the right system and all the necessary components for your installation.
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