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

丹：所以你可能会遇到不止一个、加热元件、风扇一套管系统的问题。

" 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.

“管系统”是指从熔炉到房屋各个房间的管，热空气过这些管。

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，“所以你可能会遇到不止一个、加热元件、风扇一套管系统的问题。 ”丹正在方便地列出供暖系统的不同部分。