Boilers with a closed
combustion chamber have a closed air-flue gas system, which means that there is
no possibility that the flue gases get out of the room - there is no risk of
carbon monoxide poisoning (burning). What
else distinguishes such boilers?
Boilers with a closed
combustion chamber are equipped with a exhaust fan, the use of which eliminates
problems with the chimney draft. As
a result, not only are there no problems with the exhaust gases resulting from
the disruption of the draft, for example by wind, but also with the appropriate
amount of air needed to burn the fuel. A
fan operating with variable efficiency supplies it with the same amount of heat
it needs at the moment - thanks to this, the efficiency of the boiler with the
closed combustion chamber can be higher, the exhaust fumes cleaner and
incomplete combustion resulting in the formation of dangerous carbon monoxide.
The advantage of this
type of boilers is the ability to discharge flues with a cable routed in any
way - it does not have to be a vertical chimney, because the movement of fumes
is not carried out naturally, but is forced by a fan. By using a special concentric flue-gas
duct, it is possible to discharge fumes through the wall (if the boiler power
does not exceed 21 kW), and not only through the roof. The advantage of such ducts is also
the preheating of air reaching the burner with the heat of flue gas, which
makes it possible to increase the efficiency of the boiler.
The boiler with the
closed combustion chamber and air supply from the outside can be placed in a
room with a capacity of only6.5 m3 (with
an open chamber of 8 m3 ). There
are also no problems with its construction, which would otherwise disrupt the
operation of the boiler making it difficult to suck air into the burner.
