Please call maintenance because the furnace in the main office stopped working this morning.

請打電話給維修部門，因為主辦公室的暖爐今天早上故障了。

Our factory replaced its old furnace, which cut monthly energy costs by fifteen percent.

我們工廠汰換了舊熔爐，使每月能源成本降低了百分之十五。

The hotel guest complained that the furnace made loud noises throughout the night.

這位飯店房客抱怨暖爐整晚都發出很大的噪音。