Smoke detectors: Good detectors from 20 euros ? the most expensive one in the test fails

A smoke detector can save lives. With its loud alarm, it prevents a fire from going unnoticed and residents from suffocating in their sleep. Provided it is in the right place and works optimally. In the test: 20 smoke detectors with and without wireless networking at prices ranging from 17 to 103 euros. Only 10 achieved the quality rating "good". Of all things, the most expensive one was inadequate. Good smoke detectors are available from 20 euros. At the end of 2015, the transitional period for installation ended in three federal states.