In order to generate cold air they need to expel the heat, hence the need for a condensing tube or a hose leading to the outside.
Our portable air conditioners are equipped with a hose which can be positioned through an open window.
The air conditioner can also be installed semi-permanently in a room by drilling a hole through a wall. In this case you should follow the instructions provided in the user manual.
User manuals can be accessed and downloaded directly from our website.