If you're weighing how to cool your home in Germany, you'll eventually compare a portable mobile AC against a permanently installed split system. They're very different commitments, and for renters the decision is usually clear-cut. Here's the honest comparison.
How they differ
A fixed split air conditioner has two parts — an indoor unit and an outdoor compressor — connected through a hole in the wall, installed by a professional. It cools powerfully and quietly and can serve a whole room or home for years. A mobile air conditioner is a single portable unit you plug in and vent through a window with a hose. The split performs better; the mobile is flexible and needs nothing permanent.
Installation and permission
This is the deciding factor for most people. A fixed split requires drilling, wall penetration, and an outdoor unit — permanent changes that a landlord normally must approve, and that you can't easily reverse. A mobile AC installs in minutes with a no-drill window sealing kit, needs no permission, and removes without a trace. For renters, that difference alone usually settles it. See more on the rules in our renter's cooling guide.
Performance
A fixed split wins on raw performance: more cooling power, quieter operation, and better efficiency, because it's engineered and installed for the space. A good mobile AC — especially a split-style portable — closes the gap more than people expect for a single room, but it won't match a properly installed system for a large area or whole-home cooling.
Cost
The split costs more in total once you add professional installation, even if the hardware alone seems comparable. A mobile AC is a single purchase with no installation bill, and it's the only one of the two you can buy and use the same afternoon.
Flexibility
A mobile AC moves between rooms and comes with you when you move home — the money follows you. A fixed split stays with the property. If your living situation might change, or you want to cool different rooms at different times, the mobile's flexibility is a real advantage.
Which should you choose?
| Situation | Better choice |
|---|---|
| Renting | Mobile AC |
| Owning, want whole-home cooling | Fixed split |
| Need cooling today, no permission | Mobile AC |
| Want maximum quiet and power, long-term | Fixed split |
For the large majority of renters and anyone wanting flexibility, a mobile AC is the practical winner. Check which units are in stock near you and reserve one for pickup — no installer, no permission, cooling today.