And depending on how old that window air conditioner is, it could be pretty inefficient.

而且根据窗式空调的使用年限，它的效率可能相当低。

I'd look at some of these portable heat pumps 'cause that could replace that window air conditioner.

我会考虑其中一些便携式热泵，因为它可以取代窗式空调。