Closed combustion chamber with forced draft

Closed combustion chamber with forced draft - this is a type of chamber in heating systems boilers, in which the combustion process is isolated from the room, and the supply of combustion air and the removal of combustion products is carried out using a fan or other mechanism that provides forced draft.

Closed combustion chamber with forced draft: main features

1. Closed combustion chamber:
   • The combustion chamber is completely sealed and isolated from the room. Combustion air is taken from outside the building through a coaxial chimney (double-layer chimney) or a separate air duct.
2. Forced draft:
   • A fan is used to supply air to the combustion chamber and remove combustion products. This ensures a stable combustion process regardless of weather conditions and the height of the chimney.
3. Air supply and flue gas exhaust:
   • Combustion air comes from outside, which makes such boilers safe for indoor use, as they do not consume oxygen inside the house.
   • Combustion products are removed using the same fan, which ensures their effective removal even in the presence of a long or complex chimney.
4. Coaxial chimney:
   • A coaxial chimney is usually used, which consists of two pipes: the inner pipe removes combustion products, and the outer pipe supplies combustion air. This simplifies installation and increases the energy efficiency of the system.
5. Energy independence:
   • Boilers with a closed combustion chamber and forced draft require connection to the electrical network for the fan to operate. This makes them dependent on the availability of electricity.

Advantages:

• Safety: an isolated chamber prevents combustion products from leaking into the room.
• High efficiency: more efficient combustion thanks to stable air supply and gas removal.
• Versatility in installation: such boilers can be installed in rooms with insufficient ventilation, since the combustion air comes from the street.

Disadvantages:

• Dependency on electrical supply to operate the fan.
• More complex maintenance due to additional components such as fan and air supply system.

Closed combustion chamber with forced draft preferred for modern heating systems where high energy efficiency and safety are required.