By default, only an exhaust hose to the unit to blow the hot air out, which in turn can penetrate warm outside air into the room. I have this "problem" (which all monoblock devices have) achieved with a air supply hose. This air conditioner is almost like made for it, as there are 2 Luftzulässe, the Upper, which sucks the air to cool and come out the front and the lower grille where the air is sucked in. When exhaust grille I have attached a cardboard construction with silicone and hose connection, where I also hang the Zuluftschlaucht outside. This also greatly reduces that no stinking air penetrates more (eg. Mopeds), and significantly improves the cooling efficiency.
Exhaust hose 1x 125mm original, inlet hose: 2x 120mm from the hardware store. All 3 hoses on a wooden board screwed the perfect fit in the window and it looks even professionally :)
The inlet / outlet design the air works very similar to a split air, and to reach even on hot days during extended operation and 19 ° when I want to, but then also meets this air conditioner to its limits.
The dehumidification function, I use often to reduce my terrariums / aquariums room the very high moisture something goes into loose one hour from about 80% RH to 55 to 65% and makes the climate pleasantly cool without breaking the space which is very important for the fish as I in the summer no heating rods in operation have in the aquarium.
Moderate volume it is already noisy, but that is now times a compressor in the unit, and I think the volume is ok, because it does not go with different devices monoblock. Because I know other devices where the casing vibrate, the compressor does not run smoothly or something and are really annoying on the acoustics ago. There is a constant hum just simply to which you get used to, if you remember that it is then damn comfortable in the room, then you forget the times easy :)
Recommended Super device on, or the PAC N81, which will hardly be worse.
Monoblock units are generally just not the "true" climate solution, but for hot days in summer indispensable when times had an air conditioner)