So you could have problems with more than one thermostat, heating element, fan, or set of ductwork.

丹：所以你可能会遇不止一个恒温器、加热元件、风扇或一系统的问题。

" Ductwork" refers to the tubes or passages that go from the furnace to the individual rooms of the house through which the hot air goes.

“系统”是指从熔屋各个间的或通，热空气通过这些或通。

Here we're talking about installing heating systems. Dan says, " So you could have problems with more than one thermostat, heating element, fan, or set of ductwork." Dan is listing, conveniently, different parts of a heating system.

在这里，我们谈论的是安装供暖系统。丹说，“所以你可能会遇不止一个恒温器、加热元件、风扇或一系统的问题。 ”丹正在方便地列出供暖系统的不同部分。