She says they're having problems not only with the radiators that are part of the boiler system, but also with the furnace for the extension.

她说，他们不仅在作为锅炉系统一部分的散热器方面存在问题，而且在延伸部分的炉子方面也存在问题。

The furnace sends the hot air through those ducts into the individual rooms. If you see, on the other hand, metal radiators, either by the floor or against the wall, that house has a boiler system.

熔炉通过这些管道将热空气送入各个房间。 另一方面，如果你看到金属散热器， 无论是在地板上还是靠在墙上，那所房子都有锅炉系统。