| 摘要 |
The condensation heat exchanger system for a domestic gas or oil-fired boiler comprises primary (21) and secondary (31) bundles of tubes in the form of helical coils. The burner (40) is mounted inside the primary coil. The secondary coil is mounted at the top of the burner and is shorter. A flue (7) is mounted at its end, through which the exhaust gases from the burner flow. |
