Exhaust
Ventilation
noun, verbal noun
The reject energy that you push out of a machine is exhaust. It can also be ventilation, since this is the air coming out and being rejected out.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
自動車の排気ガスの臭いが好きなのは、私達の共通点ですね。
Liking the smell of the automobile exhaust is something we have in common.