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(11) | EP 0 926 439 A3 |
(12) | EUROPEAN PATENT APPLICATION |
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(54) | Gas-fired boiler |
(57) A gas-fired boiler (10) provided with: a burner (16) arranged in a firebox (18);
a gas/water heat exchanger (20) arranged around the firebox and provided with a system
of flat pipes (22) for the conveyance of the burnt gases (14) arranged in a radial
pattern and provided with lateral recesses (106; 24) for noise reduction; a mixer
(28) for supplying a gas-air mix to the burner, structured so that the pressure of
the gas-air mix is constant regardless of the amount of mix supplied. |