How a wood
burning boiler works:
In a NIBE wood burning boiler, there are two air intakes, primary and
secondary, which provide the oxygen needed for the wood to burn.
The primary intake acts as the main oxygen source, driving the burn-
ing process; the secondary intake allows for fine tuning of the burn-
ing process and enables cleaner emissions.
In the gas burning chamber, burnable gases from the wood are
mixed with the secondary intake air, which allows full burning to oc-
cur (radiation heat) at temperatures of up to 900–1000
o
C.
At the heat transfer, gases are transported through the pipes and
convection heat transferred to the water, where it is stored.
Primary air in
Flue gases
Heat transfer
Gas burning chamber
Secondary air in
Fan
