| 摘要 |
A secondary heat exchanger (18) for a boiler assembly (10) comprises a housing (31) having a first part (31a) and a second part 31b independent of the first part (31a). The first part 31a defines a first flow path for a first fluid, and the second part (31b) defines a second flow path for a second fluid. The first part (31a) has at least two distinct first galleries (38) and the second part has a second gallery (40) which extends between the two first galleries (38) of the first part (31a). The second gallery (40) is oriented so that, in use, the second fluid flows generally vertically in the second gallery (40). <Figure 3>
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