Quick answer
A suitable window seal limits uncontrolled warm-air entry around the exhaust hose. It does not eliminate replacement air drawn in by a single-hose unit’s exhaust process. Reversible textile seals or fitted panels may suit rented homes, subject to safety and manufacturer instructions.
Textile or rigid panel?
An American sliding-window kit will not automatically fit a Swiss tilt-and-turn window. Measure the actual opening and check that handles, fittings and blinds still work.
| Solution | Benefit | Check first |
|---|---|---|
| Zipped textile | Light and usually removable | Adhesive compatibility, zip and window shape |
| Fitted acrylic panel | Stable opening | Secure fastening, edges and quick removal |
| Manufacturer adapter | Designed for the appliance | Compatibility with the existing window |
Five preparation steps
Do not improvise heavy panels that could fall out. Respect permitted bends and clearances. Do not seal openings required for ventilation or combustion appliances; obtain specialist advice if uncertain.
- Record window type, frame dimensions and required hose diameter.
- Check permitted fixing and residue-free removal; test adhesive discreetly.
- Position the unit with a short, reasonably straight hose route.
- Fit the panel or textile without crushing connections and secure the outlet.
- Check stability, air intakes and window closure before use.
Plan for rain, absence and moving out
Textile seals are neither burglary protection for an open window nor fall protection. Plan how to remove or close the arrangement during rain and when leaving home. Water must not enter the building uncontrolled.
DIY stops at façade alterations, electrical installation and the refrigerant circuit. Preparing a window does not turn fixed split installation into a DIY job.
Frequently asked questions
Is a towel in the window gap enough?
It is not a reliably stable solution. Use a suitable outlet that holds the hose securely and allows window operation.
Can I extend the exhaust hose?
Only within the manufacturer’s permitted arrangements. Additional length and tight bends can obstruct airflow.
Find a suitable installer
Search companies by canton and compare services and coverage. Send the same project description to several installers for comparable quotes.
Find companies by cantonSources and scope
For private households in Switzerland. Manufacturer information applies to the named models. Local requirements and system suitability need individual assessment. Sources link to their original language.
- Midea: PortaSplit Handbuch deutsch ↗Checked: 2026-10-02
- EnergieSchweiz: Raumklimageräte ↗Checked: 2026-10-02