Tell me what is wrong with the first picture?

Look at the first photo- it was taken from the back view of house that is currently next a house for sale. So this what I found on google maps. Tell me, can you see what is wrong?


Now, maybe it was not so obvious. So I am adding arrows to point to the problem. This image is highlighting how the people involved didn't have a through plan. And only later did they say, how are we going 'x' (I can't give it away yet)? See below

What we see is they have a duct running outside their home to heat or cool the other structure. Keep in mind this is also uninsulated duct. It isn't pretty. It isn't energy efficient. It isn't a lot of things.