Both single hose and dual / split hose have their benefits. Dual hoses do have a faster, more efficient, performance. Because of the dual hose system, one hose is constantly cooling the room while the other hose is constantly extracting hot air – as opposed to single hose which is doing double duty. So they are certainly ‘better’ in that respect. On the other hand, dual hose units tend to be louder, more expensive, and consume more electricity than single hose. At Quilo, we try to balance value with efficiency and performance, so we currently sell single hose portable air conditioners