Patent ID: 8074610

Claim:
A boiler convertible between a normal type and a condensing type, the boiler comprising: a combustion chamber for generating high-temperature combustion heat by burning fuel therein; a heat exchange section for applying heat to heating water by absorbing the high-temperature combustion heat; and an outer housing formed at an inner portion thereof with a water reservoir for circulating the heating water, wherein coupling holes are formed in the outer housing, a circulation chamber is formed at a lower portion of the outer housing, a burner is provided at an upper portion of the combustion chamber so as to generate heat in a downward direction thereof, the combustion chamber is vertically installed in one of the coupling holes, a lower portion of the combustion chamber is communicated with the circulation chamber, the heat exchange section includes first and second heat exchangers and is vertically installed in the outer housing adjacent to the combustion chamber, an upper portion of the heat exchange section is coupled to one of the coupling holes and a lower portion of the heat exchange section is communicated with the circulation chamber, an insertion hole is formed at a lateral portion of the outer housing to insert a funnel support when converting a normal type boiler into a condensing type boiler, and a funnel is provided at an upper portion of the outer housing so as to discharge an exhaust gas derived from combustion of the fuel in the combustion chamber, and a noise-absorbing container is provided at the upper portion of the outer housing so as to connect the funnel with the outer housing, and the funnel is separable from the noise-absorbing container.