(57) The invention relates to a boiler (1) with pressurized firebox, particularly suitable
for use in combination with a blue flame burner; the boiler (1) comprises a firebox
area (11) which is surrounded by a tank (7) containing the water to be heated. The
tank (7) is divided into two compartments (18,19): an inner one (18) surrounding the
firebox area (11), and an outer one (19) arranged around the inner compartment (18)
and in heat exchange relationship therewith. The inner compartment (18) may be intended,
for instance, for supplying the radiators of a heating system, whilst the outer compartment
(19) may be intended for supplying sanitary water. The boiler (1) further comprises
a muffler (17) which may accommodate a superheater assembly for quick hot water production,
even when starting from cold, such as where used as a water heater.
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