CO Alarms for Tenants in Germany: Check & Use

As a tenant in Germany you should know how CO alarms work, who is responsible for installation and maintenance, and which immediate actions can save lives in an alarm. This article explains in practical terms how to check CO alarms, assess typical landlord duties and use installed or retrofitted devices correctly. It is aimed specifically at families in rental homes and avoids jargon; instead you will find concrete steps, sample wording for notices to the landlord and guidance on when a court may become involved. You will also learn which official agencies and forms are relevant and where to find local advice.

What is a CO alarm?

Carbon monoxide (CO) is odorless and can accumulate indoors, for example from faulty heaters or stoves. CO alarms alert early to dangerous concentrations and are therefore particularly important for families. Check the manufacturers instructions and the display regularly.^[3]

Rights and duties for tenants

Under tenancy law the landlord must maintain the dwelling in a condition fit for contractual use. The rules are found in the Civil Code (BGB §§ 535 60a).^[1] Disputes about retrofitting or maintenance are usually decided by local courts.^[2]

Practical check steps

• Monthly test: Press the test button and note date and result.
• Replace batteries: For battery-powered units at least once a year or immediately when a warning sounds.
• Check placement: Do not place detectors directly next to cooking appliances or windows; follow manufacturer guidance.
• Documentation: Keep photos of the device and a log in case of an alarm.

Frequently Asked Questions

Who must install CO alarms?

Usually the landlord is responsible for providing and properly installing detectors, unless the lease states otherwise.

Can I install my own CO alarms as a tenant?

Yes, tenants may generally add their own detectors; check in advance whether this requires structural changes or whether the landlord objects.

What to do if the alarm sounds?

If the alarm sounds: open windows, leave the building, call emergency services and inform the landlord. Document times and measures taken.

How-To

1. Read the manufacturers instructions carefully and note model and installation date.
2. Test the detector monthly with the test button and record the date.^[4]
3. Keep a simple check log with date, result and photo.
4. Inform the landlord in writing (email or letter). Use a sample letter if needed.^[4]
5. If the landlord does not respond, consider legal steps at the competent local court.

Help & Support

• Civil Code (BGB)  - Gesetze im Internet
• Information on carbon monoxide - Umweltbundesamt
• Information on courts - Justice portal

1. [1] Civil Code (BGB)  - Gesetze im Internet
2. [2] Information on courts - Justice portal
3. [3] Information on carbon monoxide - Umweltbundesamt
4. [4] Sample letters and forms - Federal Ministry of Justice